<div dir="ltr"><div>Dear Nathan,</div><div><br></div>Thank you for the answer, and links to the right page of documentation! They are very helpful to me.<div>I'm going to try a particle filter.</div><div><br></div><div>Y.T.</div></div><div class="gmail_extra"><br><div class="gmail_quote">2017-10-11 16:24 GMT-04:00 Nathan Goldbaum <span dir="ltr"><<a href="mailto:nathan12343@gmail.com" target="_blank">nathan12343@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>OK, in that case I wouldn't try to infer the stellar mass from the Dark_Matter_Density field (which does include stellar mass despite the name), instead I would define a particle filter for stars (<a href="http://yt-project.org/doc/analyzing/filtering.html#filtering-particle-fields" target="_blank">http://yt-project.org/doc/<wbr>analyzing/filtering.html#<wbr>filtering-particle-fields</a>) and then use the new particle type defined by the filter to create a deposited particle field (<a href="http://yt-project.org/doc/analyzing/fields.html#deposited-particle-fields" target="_blank">http://yt-project.org/doc/<wbr>analyzing/fields.html#<wbr>deposited-particle-fields</a>).</div><div><br></div><div>There's an example in the docs for how to do this with Tipsy data here: <a href="http://yt-project.org/doc/cookbook/constructing_data_objects.html#creating-particle-filters" target="_blank">http://yt-project.org/doc/<wbr>cookbook/constructing_data_<wbr>objects.html#creating-<wbr>particle-filters</a></div><div><br></div><div>For Enzo, you should use the particle_type field to create the filter - star particles in Enzo have particle_type equal to 2. Here's a short worked example:</div><div><br></div><div><a href="https://gist.github.com/anonymous/acd4007dbff283fc3587a47e8ba41dc3" target="_blank">https://gist.github.com/<wbr>anonymous/<wbr>acd4007dbff283fc3587a47e8ba41d<wbr>c3</a></div><div><br></div><div>Hope that helps! And I hope to hear more from you - your name is particularly well suited to the yt project ;)</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>-Nathan<br></div><div><br></div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 11, 2017 at 12:58 PM, ｔyuta <span dir="ltr"><<a href="mailto:y0u1t1a5.t@gmail.com" target="_blank">y0u1t1a5.t@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Yes, it's Enzo data.</div><div class="m_4122107036822087291HOEnZb"><div class="m_4122107036822087291h5"><div class="gmail_extra"><br><div class="gmail_quote">2017-10-11 10:17 GMT-04:00 Nathan Goldbaum <span dir="ltr"><<a href="mailto:nathan12343@gmail.com" target="_blank">nathan12343@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div dir="auto">What simulation code are you working with? From the field names it sounds like Enzo data.</div><br><div class="gmail_quote"><div><div class="m_4122107036822087291m_-2520757203057627010h5"><div>On Wed, Oct 11, 2017 at 9:13 AM ｔyuta <<a href="mailto:y0u1t1a5.t@gmail.com" target="_blank">y0u1t1a5.t@gmail.com</a>> wrote:<br></div></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_4122107036822087291m_-2520757203057627010h5"><div><span style="font-size:14px">Dear yt-users,</span><div style="font-size:14px"><br></div><div style="font-size:14px">Hi, I'm a new user of yt. I have a question about the default 'Density' field and 'Dark_Matter_Density' field. Do they contain stellar mass? If so, how can I read and subtract stellar mass from the data?</div><div style="font-size:14px"><br></div><div style="font-size:14px">Sincerely,</div><div style="font-size:14px">Y.T.</div></div></div></div>
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