<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body dir="auto">
<div>Great!</div>
<div><br>
</div>
<div>If you'd like some sample code, clone my branch drudd/yt-3.0-artio and use the artio reader on particles.</div>
<div><br>
</div>
<div>In that fork I've also experimented with setting up derived fields with an explicit type, say ParticleMassMsun for each of all, stars, and nobody, but this seems to break naked requests for data["ParticleMassMsun"], which translates the type into 'unknown'.</div>
<div><br>
</div>
<div>The star formation spectrum code currently works with untyped fields dd["creation_time"]. I'd in principle like to change those to ("star","creation_time") to be explicit and future compatible (avoid including black holes that also have creation times
associated), but that will currently break frontends that don't have types or know how to subselect by type.</div>
<div><br>
</div>
<div>Another option that would work for artio is have naked requests resolve to the correct particle type, if only one particle type supports it, or "all" otherwise. <br>
<br>
<div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">
Douglas Rudd</div>
<div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">
Scientific Computing Consultant</div>
<div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">
Research Computing Center and</div>
<div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">
Kavli Center for Cosmological Physics</div>
<div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">
<a href="mailto:drudd@uchicago.edu">drudd@uchicago.edu</a></div>
</div>
<div><br>
On Mar 14, 2013, at 7:08 AM, "Matthew Turk" <<a href="mailto:matthewturk@gmail.com">matthewturk@gmail.com</a>> wrote:<br>
<br>
</div>
<div><span></span></div>
<blockquote type="cite">
<div><span>Hi Doug,</span><br>
<span></span><br>
<span>On Wed, Mar 13, 2013 at 7:56 PM, Douglas Harvey Rudd <<a href="mailto:drudd@uchicago.edu">drudd@uchicago.edu</a>> wrote:</span><br>
<blockquote type="cite"><span>Okay, I had noticed this thread but hadn't fully digested that I had hit the very same issue.</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>I'm +1 on Chris' change, for the exact same reason (ParticleMassMsun for star particle types).</span><br>
</blockquote>
<span></span><br>
<span>Awesome.</span><br>
<span></span><br>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Matt: I didn't quite follow your message. I would assume most derived fields should be neutral</span><br>
</blockquote>
<blockquote type="cite"><span>to the type of particle, since they're typically unit conversions. Having two particle types with the</span><br>
</blockquote>
<blockquote type="cite"><span>same field name that are not compatible should be forbidden, otherwise ("all", ) would be nonsensical.</span><br>
</blockquote>
<span></span><br>
<span>Good point.</span><br>
<span></span><br>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Why is discriminating particles and fluids desirable here? By the particle_ naming convention</span><br>
</blockquote>
<blockquote type="cite"><span>for particle fields there shouldn't be any overlap. I feel that I must have missed something.</span><br>
</blockquote>
<span></span><br>
<span>There has been some talk of moving away from that. (It is an</span><br>
<span>Enzo-ism.) Although, looks like in Casey's YTEP for field names, we</span><br>
<span>retain them:</span><br>
<span></span><br>
<span><a href="https://ytep.readthedocs.org/en/latest/YTEPs/YTEP-0003.html">https://ytep.readthedocs.org/en/latest/YTEPs/YTEP-0003.html</a></span><br>
<span></span><br>
<span>The only issue I was thinking of was that there may be a time when we</span><br>
<span>want to do "mass" that applies to both.</span><br>
<span></span><br>
<span>That being said, as long as we keep "all" as the main name, there's no</span><br>
<span>issue. So let's mark my concern as unwarranted.</span><br>
<span></span><br>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>In a similar vein, I've changed our GeometryHandler._detect_fields function to generate all valid</span><br>
</blockquote>
<blockquote type="cite"><span>(particle_type, field) pairs, so that ("nbody","creation_time") is not a valid field, for example, while</span><br>
</blockquote>
<blockquote type="cite"><span>("all","particle_mass"), ("nbody","particle_mass"), and ("stars","particle_mass") are all valid. This</span><br>
</blockquote>
<blockquote type="cite"><span>has broken the known field support, however, since we currently only add naked field types,</span><br>
</blockquote>
<blockquote type="cite"><span>without particle types. It would be a pain to need to add all valid pairs in fields.py as well.</span><br>
</blockquote>
<span></span><br>
<span>I agree. I think your solution is right, they should be detected</span><br>
<span>correctly in that routine. I'll work on getting the field system</span><br>
<span>Chris proposed working, which should be a first step toward fixing the</span><br>
<span>valid pairs issue.</span><br>
<span></span><br>
<span>-Matt</span><br>
<span></span><br>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Douglas Rudd</span><br>
</blockquote>
<blockquote type="cite"><span>Scientific Computing Consultant</span><br>
</blockquote>
<blockquote type="cite"><span>Research Computing Center</span><br>
</blockquote>
<blockquote type="cite"><span><a href="mailto:drudd@uchicago.edu">drudd@uchicago.edu</a></span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>On Mar 10, 2013, at 7:21 PM, Matthew Turk <<a href="mailto:matthewturk@gmail.com">matthewturk@gmail.com</a>> wrote:</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>I'd rather that not work, to tell the truth. I think Chris's</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>suggestion, where you define a derived field that is neutral to the</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>*type* of particle, is powerful, but I don't see an advantage to it</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>during the call to getting the data, particularly since that loses a</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>bit of ability to discriminate between particles/fluids.</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>On Sun, Mar 10, 2013 at 8:14 PM, Nathan Goldbaum <<a href="mailto:nathan12343@gmail.com">nathan12343@gmail.com</a>> wrote:</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Just to clarify, dd[…, "ParticleMassMsun"] would work as well, right?</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>On Mar 10, 2013, at 5:05 PM, Christopher Moody <<a href="mailto:chrisemoody@gmail.com">chrisemoody@gmail.com</a>></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>wrote:</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Hi Sam,</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Yeah; I think it should change only the derived field. You want the derived</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>field to pass along whatever field type you asked for, or use the implicit</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>one if you didn't ask for the type explicitly. If you tried to implement</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>this in the original call, you'd do something like</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>dd[(Ellipsis,"ParticleMassMsun")]. I can't see use cases where this would</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>be better than dd[("all","ParticleMassMsun")] -- so yeah, no changes to the</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>original call.</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>chris</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>On Sun, Mar 10, 2013 at 4:30 PM, Sam Skillman <<a href="mailto:samskillman@gmail.com">samskillman@gmail.com</a>> wrote:</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Hi Chris,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Just to be clear, this change would occur in the derived field definition,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>not the call to get the star ParticleMassMsun itself, correct?</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>If so, I think something like this, or with a yt-specific term, would be</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>great.</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Thanks,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Sam</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>On Sun, Mar 10, 2013 at 5:20 PM, Matthew Turk <<a href="mailto:matthewturk@gmail.com">matthewturk@gmail.com</a>></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>wrote:</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Hi Chris,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>On Sat, Mar 9, 2013 at 4:00 PM, Christopher Moody <<a href="mailto:chrisemoody@gmail.com">chrisemoody@gmail.com</a>></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>wrote:</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Hi everyone,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Fields in yt-3.0 are now defined like (field_type,field_name) but for</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>backwards-compatibility still maintains a field_name -></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>("all",field_name)</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>mapping. Consider a few use cases:</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>keys = ["ParticleMassMsun",</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span> ("all","ParticleMassMsun"),</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span> ("stars","particle_mass"),</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span> ("stars","ParticleMassMsun") ]#broken</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>I think we all have natural expectations for what should happen, but at</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>the</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>moment the last key in the series is broken. particle_mass is a native</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>field, ParticleMassMsun is a derived field:</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>def _ParticleMassMsun(field, data):</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span> return data["particle_mass"]/mass_sun_cgs</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>add_field("ParticleMassMsun", function=_ParticleMassMsun,</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>particle_type=True)</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Note that in this case data["particle_mass"] maps to</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>data[("all","particle_mass")] even when I originally asked for</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>dd[("stars","ParticleMassMsun")], which is why things break.</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>So I propose a syntax where in the derived field definition we can do</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>something like data[(Ellipsis,"ParticleMassMsun")] or alternatively</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>data[(field.field_type,"ParticleMassMsun")]. This ensures that derived</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>fields will work intuitively and be as specific to a field type as they</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>want</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>to be or just pass through whatever field type they may want.</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>I like this, but maybe we should use a yt-specific object instead of</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Ellipsis. This would be very nice and is something I have thought /</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>worried about and been unable to come up with an elegant solution for.</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Seems like you found one! :)</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>This week I need to address this for my own work on a simulation with</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>multiple particle types; I'll take a pass at implementing something</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>like this. We're also a bit overdue for a YTEP that details access to</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>multiple fluids and multiples particles. Once some things get off my</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>plate on Tuesday I will make that a priority. Then we can use that as</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>a place to sort of hash this out and how it'll work.</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>-Matt</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>Thanks!</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>chris</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite"><span></span><br>
</blockquote>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
</blockquote>
<blockquote type="cite">
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
<blockquote type="cite"><span>yt-dev mailing list</span><br>
</blockquote>
<blockquote type="cite"><span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
</blockquote>
<blockquote type="cite"><span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</blockquote>
<span>_______________________________________________</span><br>
<span>yt-dev mailing list</span><br>
<span><a href="mailto:yt-dev@lists.spacepope.org">yt-dev@lists.spacepope.org</a></span><br>
<span><a href="http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org">http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org</a></span><br>
</div>
</blockquote>
</body>
</html>