<div dir="ltr"><h1 class="gmail-part" id="gmail-yt-34-release-notes" style="box-sizing:border-box;margin:0px 0px 16px;font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";line-height:1.25;color:rgb(51,51,51);padding-bottom:0.3em;border-bottom:1px solid rgb(238,238,238);letter-spacing:0.35px">yt 3.4 release notes</h1><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">The yt community is proud to announce the release of yt 3.4.0. This is a major release and includes a number of new features, minor improvements, and bugfixes.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">yt (<a href="http://yt-project.org/" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">http://yt-project.org</a>) is an open source, community developed toolkit for the analysis and visualization of volumetric data.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">Since our last major release we have moved code hosting to GitHub. If you are interested in contributing to yt, please see our new home at <a href="http://github.com/yt-project/yt" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">http://github.com/yt-project/yt</a>.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">In addition, we have merged 450 pull requests from 44 contributors, including 19 new contributors:</p><ul class="gmail-part" style="box-sizing:border-box;margin-top:0px;margin-bottom:16px;padding-left:2em;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px"><li class="gmail-" style="box-sizing:border-box"><span style="box-sizing:border-box;font-weight:700">Alexander Lindsay</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Andrew Myers</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Austin Gilbert</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Avik Laha</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Ben Keller</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Benjamin Thompson</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Bili Dong</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Britton Smith</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Cameron Hummels</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Chang-Goo Kim</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Corentin Cadiou</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">David Hannasch</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Enrico Garaldi</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Fabian Koller</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Hilary Egan</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Hsi-Yu Schive</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Hugo Pfister</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Jared Coughlin</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Jill Naiman</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">John McCann</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">John Regan</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">John Wise</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">John ZuHone</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Jonah Miller</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Joseph Smidt</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Kacper Kowalik</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Kausik Venkat</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Marianne Corvellec</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Mark Richardson</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Matthew Krafczyk</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Matthew Turk</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Michael Zingale</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Nathan Goldbaum</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Nicholas Earl</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Rafael Ruggiero</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Rasmi Elasmar</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Robert Thompson</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Sam Skillman</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Salvatore Cielo</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Suoqing Ji</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Ting-Wai To</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Weiguang Cui</span></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Yi-Hao Chen</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><span style="box-sizing:border-box;font-weight:700">Yinghe Lu</span></li></ul><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">The bolded names indicate first-time contributors. We extend our sincere gratitude to everyone who has contributed!</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">See the changelog below for a summary of new features, changes, and bugfixes.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">For more information, including installation instructions, links to community resources, and information on contributing to yt’s development, please see the yt homepage at <a href="http://yt-project.org/" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">http://yt-project.org</a> and the documentation for yt 3.4.0 at <a href="http://yt-project.org/docs/3.4.0" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">http://yt-project.org/docs/3.4.0</a>.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">Binaries for yt 3.4.0 are available via <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">pip</code> and <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">conda</code>. If you installed via the install script or use <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">conda</code> to manage your python installation, you can update yt via:</p><pre class="gmail-part" style="box-sizing:border-box;overflow:auto;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:16px;margin-top:0px;margin-bottom:16px;line-height:1.45;color:rgb(51,51,51);word-break:break-all;word-wrap:normal;background-color:rgb(247,247,247);border-radius:3px;letter-spacing:0.35px;border:inherit"><code class="gmail-bash gmail-hljs" style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0px;background:transparent;border-radius:3px;display:inline;overflow:visible;margin:0px;word-break:normal;border:0px;line-height:inherit;word-wrap:normal;color:inherit">$ conda update -c conda-forge yt
</code></pre><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">And via <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">pip</code> if you manage your python installation with <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">pip</code>:</p><pre class="gmail-part" style="box-sizing:border-box;overflow:auto;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:16px;margin-top:0px;margin-bottom:16px;line-height:1.45;color:rgb(51,51,51);word-break:break-all;word-wrap:normal;background-color:rgb(247,247,247);border-radius:3px;letter-spacing:0.35px;border:inherit"><code class="gmail-bash gmail-hljs" style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0px;background:transparent;border-radius:3px;display:inline;overflow:visible;margin:0px;word-break:normal;border:0px;line-height:inherit;word-wrap:normal;color:inherit">$ pip install -U yt
</code></pre><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">As always, if you have any questions, concerns, or run into any trouble updating please don’t hesitate to send a message to the mailing list or stop by our Slack or IRC channel.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">yt is the product of a large community of developers and users and we are extraordinarily grateful for and proud of their contributions. Please forward this announcement on to any interested parties.</p><p class="gmail-part" style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px">Best,<br style="box-sizing:border-box">The yt development team</p><h1 class="gmail-part" id="gmail-major-changes-and-new-features" style="box-sizing:border-box;margin:24px 0px 16px;font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";line-height:1.25;color:rgb(51,51,51);padding-bottom:0.3em;border-bottom:1px solid rgb(238,238,238);letter-spacing:0.35px"><a class="gmail-anchor gmail-hidden-xs" href="https://hackmd.io/EYMxGNgEwRgDgLQFYAsBDKCUAYDswE0QAmATgVLm3AFNcliYRgBmIA==#major-changes-and-new-features" title="major-changes-and-new-features" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none;float:left;padding-right:4px;line-height:1"><span class="gmail-octicon gmail-octicon-link" style="box-sizing:border-box;font-weight:normal;font-stretch:normal;font-size:16px;line-height:1;font-family:octicons;display:inline-block;color:rgb(0,0,0);vertical-align:middle"></span></a>Major Changes and New Features</h1><ul class="gmail-part" style="box-sizing:border-box;margin-top:0px;margin-bottom:16px;padding-left:2em;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px"><li class="gmail-" style="box-sizing:border-box">yt now supports displaying plots using the interactive matplotlib backends. To enable this functionality call <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.toggle_interactivity()</code>. This is currently supported at an experimental level, please let us know if you come across issues using it. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2294" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2294</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The yt configuration file should now be located in a location following the XDG_CONFIG convention (usually <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">~/.config/yt/ytrc</code>) rather than the old default location (usually <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">~/.yt/config</code>). You can use <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt config migrate</code> at the bash command line to migrate your configuration file to the new location. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2343" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2343</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.LinePlot</code>, a new plotting class for creating 1D plots along lines through a dataset. See <a href="https://github.com/yt-project/yt/pull/1509" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1509</a> and <a href="https://github.com/yt-project/yt/pull/1440" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1440</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.define_unit</code> to easily define new units in yt’s unit system. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2485" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2485</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.plot_2d</code>, a wrapper around SlicePlot for plotting 2D datasets. See <a href="https://github.com/yt-project/yt/pull/1476" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1476</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">We have restored support for boolean data objects. Boolean objects are data objects that are defined in terms of boolean operations on other data objects. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2257" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2257</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Datasets now have a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">fields</code> attribute that allows access to fields via a python object. For example, instead of using a tuple field name like <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">('gas', 'density')</code>, one can now use <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.fields.gas.density</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2459" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2459</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">It is now possible to create a wider variety of data objects via <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.r</code>, including rays, fixed resolution rays, points, and images. See <a href="https://github.com/yt-project/yt/pull/1518" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1518</a> and <a href="https://github.com/yt-project/yt/pull/1393" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1393</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">add_field</code> and <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.add_field</code> must now be called with a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">sampling_type</code> keyword argument. Possible values are currently <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">cell</code> and <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">particle</code>. We have also deprecated the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">particle_type</code> keyword argument in favor of <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">sampling_type='cell'</code>. For now a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">'cell'</code> <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">sampling_type</code> is assumed if <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">sampling_type</code> is not specified but in the future <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">sampling_type</code> will always need to be specified.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">Athena++</code> code. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2149" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2149</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">Enzo-p</code> code. See <a href="https://github.com/yt-project/yt/pull/1447" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1447</a>, <a href="https://github.com/yt-project/yt/pull/1443" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1443</a> and <a href="https://github.com/yt-project/yt/pull/1439" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1439</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">AMReX</code> code. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2530" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2530</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">openPMD</code> output format. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2376" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2376</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for reading face-centered and vertex-centered fields for block AMR codes. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2575" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2575</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for loading outputs from the Amiga Halo Finder. See <a href="https://github.com/yt-project/yt/pull/1477" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1477</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for particle fields for Boxlib data. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2510" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2510</a> and <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2497" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2497</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for custom RAMSES particle fields. See <a href="https://github.com/yt-project/yt/pull/1470" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1470</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for RAMSES-RT data. See <a href="https://github.com/yt-project/yt/pull/1456" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1456</a> and <a href="https://github.com/yt-project/yt/pull/1449" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1449</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for Enzo MHDCT fields. See <a href="https://github.com/yt-project/yt/pull/1438" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1438</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for units and particle fields to the GAMER frontend. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2366" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2366</a> and <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2408" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2408</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for type 2 Gadget binary outputs. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2355" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2355</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added the ability to detect and read double precision Gadget data. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2537" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2537</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added the ability to detect and read in big endian Gadget data. See <a href="https://github.com/yt-project/yt/pull/1353" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1353</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for Nyx datasets that do not contain particles. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2571" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2571</a></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">A number of untested and unmaintained modules have been deprecated and moved to the <a href="https://github.com/yt-project/yt_attic" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">yt attic repository</a>. This includes the functionality for calculating two point functions, the Sunrise exporter, the star analysis module, and the functionality for calculating halo mass functions. If you are interested in working on restoring the functionality in these modules, we welcome contributions. Please contact us on the mailing list or by opening an issue on GitHub if you have questions.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The particle trajectories functionality has been removed from the analysis modules API and added as a method of the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">DatasetSeries</code> object. You can now create a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ParticleTrajectories</code> object using <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ts.particle_trajectories()</code> where <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ts</code> is a time series of datasets.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">spectral_integrator</code> analysis module is now available via <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.fields.xray_emission_fields</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2465" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2465</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">photon_simulator</code> analysis module has been deprecated in favor of the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">pyXSIM</code>package, available separately from <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2441" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2441</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.utilities.fits_image</code> is now available as <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.visualization.fits_image</code>. In addition classes that were in the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.utilities.fits_image</code> namespace are now available in the main <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt</code> namespace.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">profile.variance</code> attribute has been deprecated in favor of <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">profile.standard_deviation</code>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">number_of_particles</code> key no longer needs to be defined when loading data via the stream frontend. See <a href="https://github.com/yt-project/yt/pull/1428" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1428</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The install script now only supports installing via miniconda. We have removed support for compiling python and yt’s dependencies from source. See <a href="https://github.com/yt-project/yt/pull/1459" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1459</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">plot.set_background_color</code> for <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">PlotWindow</code> and <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">PhasePlot</code> plots. This lets users specify a color to fill in the background of a plot instead of the default color, white. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2513" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2513</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">PlotWindow</code> plots can now optionally use a right-handed coordinate system. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2318" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2318</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The isocontour API has been overhauled to make use of units. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2453" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2453</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">Dataset</code> instances now have a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">checksum</code> property, which can be accessed via <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.checksum</code>. This provides a unique identifier that is guaranteed to be the same from session to session. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2503" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2503</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">data_source</code> keyword argument to <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">OffAxisProjectionPlot</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2490" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2490</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt download</code> command-line helper to download test data from <a href="http://yt-project.org/data" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">http://yt-project.org/data</a>. For more information see <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt download --help</code> at the bash command line. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2495" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2495</a> and <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2471" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2471</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt upload</code> command-line helper to upload files to the <a href="https://docs.hub.yt/services.html#curldrop" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">yt curldrop</a> at the bash command line. See <a href="https://github.com/yt-project/yt/pull/1471" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1471</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">If it’s installed, colormaps from the <a href="http://matplotlib.org/cmocean/" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">cmocean package</a> will be made available as yt colormaps. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2439" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2439</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">It is now possible to visualize unstructured mesh fields defined on multiple mesh blocks. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2487" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2487</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Add support for second-order interpolation when slicing tetrahedral unstructured meshes. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2550" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2550</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Add support for volume rendering second-order tetrahedral meshes. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2401" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2401</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Add support for QUAD9 mesh elements. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2549" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2549</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Add support for second-order triangle mesh elements. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2378" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2378</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for dynamical dark energy parameterizations to the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">Cosmology</code> object. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2572" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2572</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em"><code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ParticleProfile</code> can now handle log-scaled bins and data with negative values. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2564" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2564</a> and <a href="https://github.com/yt-project/yt/pull/1510" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1510</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Cut region data objects can now be saved as reloadable datasets using <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">save_as_dataset</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2541" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2541</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Clump objects can now be saved as reloadable datasets using <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">save_as_dataset</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2326" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2326</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">It is now possible to specify the field to use for the size of the circles in the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">annotate_halos</code> plot modifying function. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2493" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2493</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.max_level</code> attribute is now a property that is computed on demand. The more verbose <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ds.index.max_level</code> will continue to work. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2461" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2461</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">PointSource</code> volume rendering source now optionally accepts a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">radius</code> keyword argument to draw spatially extended points. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2404" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2404</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">It is now possible to save volume rendering images in eps, ps, and pdf format. See <a href="https://github.com/yt-project/yt/pull/1504" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1504</a>.</li></ul><h1 class="gmail-part" id="gmail-minor-enhancements-and-bugfixes" style="box-sizing:border-box;margin:24px 0px 16px;font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";line-height:1.25;color:rgb(51,51,51);padding-bottom:0.3em;border-bottom:1px solid rgb(238,238,238);letter-spacing:0.35px"><a class="gmail-anchor gmail-hidden-xs" href="https://hackmd.io/EYMxGNgEwRgDgLQFYAsBDKCUAYDswE0QAmATgVLm3AFNcliYRgBmIA==#minor-enhancements-and-bugfixes" title="minor-enhancements-and-bugfixes" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none;float:left;padding-right:4px;line-height:1"><span class="gmail-octicon gmail-octicon-link" style="box-sizing:border-box;font-weight:normal;font-stretch:normal;font-size:16px;line-height:1;font-family:octicons;display:inline-block;color:rgb(0,0,0);vertical-align:middle"></span></a>Minor Enhancements and Bugfixes</h1><ul class="gmail-part" style="box-sizing:border-box;margin-top:0px;padding-left:2em;color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,"Helvetica Neue",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:16px;letter-spacing:0.35px;margin-bottom:0px"><li class="gmail-" style="box-sizing:border-box">Fixed issue selecting and visualizing data at very high AMR levels. See <a href="https://github.com/yt-project/yt/pulls/1521" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1521</a>and <a href="https://github.com/yt-project/yt/pull/1433" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1433</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Print a more descriptive error message when defining a particle filter fails with missing fields See <a href="https://github.com/yt-project/yt/pull/1517" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1517</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Removed grid edge rounding from the FLASH frontend. This fixes a number of pernicious visualization artifacts for FLASH data. See <a href="https://github.com/yt-project/yt/pull/1493" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1493</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Parallel projections no longer error if there are less io chunks than MPI tasks. See <a href="https://github.com/yt-project/yt/pull/1488" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1488</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">A memory leak in the volume renderer has been fixed. See <a href="https://github.com/yt-project/yt/pull/1485" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1485</a> and <a href="https://github.com/yt-project/yt/pull/1435" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1435</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">force_override</code> keyword argument now raises an error when used with on-disk fields. See <a href="https://github.com/yt-project/yt/pull/1516" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1516</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Restore support for making plots from reloaded plots. See <a href="https://github.com/yt-project/yt/pull/1514" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1514</a></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Don’t ever try to read inputs or probin files for Castro and Maestro. See <a href="https://github.com/yt-project/yt/pull/1445" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1445</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fixed issue that caused visualization artifacts when creating an off-axis projection for particle or octree AMR data. See <a href="https://github.com/yt-project/yt/pull/1434" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1434</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fix i/o for the Enzo <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">'Dark_Matter_Density'</code> field. See <a href="https://github.com/yt-project/yt/pull/1360" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1360</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Create the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">'particle_ones'</code> field even if we don’t have a particle mass field. See <a href="https://github.com/yt-project/yt/pull/1424" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1424</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fixed issues with minor colorbar ticks with symlog colorbar scaling. See <a href="https://github.com/yt-project/yt/pull/1423" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1423</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Using the rockstar halo finder is now supported under Python3. See <a href="https://github.com/yt-project/yt/pull/1414" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1414</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fixed issues with orientations of volume renderings when compositing multiple sources. See <a href="https://github.com/yt-project/yt/pull/1411" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1411</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added a check for valid AMR structure in <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">load_amr_grids</code>. See <a href="https://github.com/yt-project/yt/pull/1408" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1408</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fix bug in handling of periodic boundary conditions in the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">annotate_halos</code> plot modifying function. See <a href="https://github.com/yt-project/yt/pull/1351" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Github PR 1351</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Add support for plots with non-unit aspect ratios to the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">annotate_scale</code> plot modifying function. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2551" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2551</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fixed issue with saving light ray datasets. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2589" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2589</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added support for 2D WarpX data. ee <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2583" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2583</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Ensure the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">particle_radius</code> field is always accessed with the correct field type. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2562" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2562</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">It is now possible to use a covering grid to access particle filter fields. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2569" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2569</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The x limits of a <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ProfilePlot</code> will now snap exactly to the limits specified in calls to <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">ProfilePlot.set_xlim</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2546" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2546</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Added a cookbook example showing how to make movies using matplotlib’s animation framework. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2544" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2544</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Use a parallel-safe wrapper around mkdir when creating new directories. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2570" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2570</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Removed <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.utilities.spatial</code>. This was a forked version of <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">scipy.spatial</code> with support for a periodic KD-tree. Scipy now has a periodic KD-tree, so we have removed the forked version from yt. Please use <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">scipy.spatial</code> if you were relying on <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">yt.utilities.spatial</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2576" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2576</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Improvements for the <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">HaloCatalog</code>. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2536" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2536</a> and <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2535" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2535</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Removed <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">'log'</code> in colorbar label in annotated volume rendering. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2548" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2548</a></li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Fixed a crash triggered by depositing particle data onto a covering grid. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2545" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2545</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Ensure field type guessing is deterministic on Python3. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2559" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2559</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">Removed unused yt.utilities.exodusII_reader module. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2533" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2533</a>.</li><li class="gmail-" style="box-sizing:border-box;margin-top:0.25em">The <code style="box-sizing:border-box;font-family:Menlo,Monaco,Consolas,"Courier New",monospace;font-size:13.6px;padding:0.2em 0px;background-color:rgba(0,0,0,0.04);border-radius:3px;margin:0px;color:inherit">cell_volume</code> field in curvilinear coordinates now uses an exact rather than an approximate definition. See <a href="https://bitbucket.org/yt_analysis/yt/pull-requests/2466" target="_blank" style="box-sizing:border-box;background-color:transparent;color:rgb(51,122,183);text-decoration-line:none">Bitbucket PR 2466</a>.</li></ul></div>