<div dir="ltr">Hi Alexander,<div><br></div><div>You're right, that functionality is currently not functional. The error message could certainly be improved - but basically it is trying to find the attribute find_field_value_at_point attached to the `Dataset` object and is not successful. Also, it's worth noting that `pf.h` is the same thing as just `pf` in the current version of yt-3.0. `pf.h` exists only for compatibility with legacy scripts and should be avoided in new scripts.</div>
<div><br></div><div>In yt 2.x, this functionality was provided via the ObjectFindingMixin class, which the GridHierarchy inherited from. Since the algorithm implemented by the find_field_value_at_point only worked for grid datasets, it has been disabled in yt-3.0. I think the plan is to reimplement it using the new chunking system but no one has done so yet.</div>
<div><br></div><div>See this issue: <a href="https://bitbucket.org/yt_analysis/yt/issue/499/missing-hierarchy-functions">https://bitbucket.org/yt_analysis/yt/issue/499/missing-hierarchy-functions</a></div><div><br></div>
<div>
Cheers,</div><div><br></div><div>Nathan</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, May 21, 2014 at 11:42 AM, Alexander A. Kaurov <span dir="ltr"><<a href="mailto:akaurov@gmail.com" target="_blank">akaurov@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">Hi all,<br><br>I'm trying to access field value in a given point in ARTIO file (sample data file: sizmbhloz-clref04SNth-rs9_a0.9011<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">
). The function '</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"></div>find_field_value_at_point<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">
' seems to be not working. May be I'm using it wrong?</div><div><font face="arial, helvetica, sans-serif"><br></font><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Here is the code:</div>
<div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div>from yt.mods import *<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"></div></div><div><font face="arial, helvetica, sans-serif">pf=load('test-data/sizmbhloz-clref04SNth-rs9_a0.9011/sizmbhloz-clref04SNth-rs9_a0.9011.art')</font><br>
pf.h.<div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline"></div>find_field_value_at_point(('artio', 'HVAR_GAS_DENSITY'),[0.1,0.1,0.1])<br>
<br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">And the error:</div><br><div>Traceback (most recent call last):<br> File "<stdin>", line 1, in <module><br> File "/lustre/kaurov/anaconda/lib/python2.7/site-packages/yt-3.0dev-py2.7-linux-x86_64.egg/yt/data_objects/static_output.py", line 84, in __getattr__<br>
raise AttributeError<br>AttributeError</div><div><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Thanks!</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Sasha</div><br></div></div></div>
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