[yt-users] physical quantities

[Desika Narayanan]

Hi yt,

I have a pretty simple question that I ought to know the answer to -  how
do I extract the actual values in the field_list or derived_field_list of a
ds?

For example, I have a field: ('PartType0', 'Coordinates'),

but printing something like pf[('PartType0','Coordinates')] doesn't return
the list of particle type 0 coordinates (or anything for that matter).  Do
I have to access this through a pf.all_data() command somehow?

Thanks
-desika
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