[yt-users] Field existence check
David Collins
dcollins at physics.ucsd.edu
Wed May 27 15:14:11 PDT 2009
> pf = load("my_data")
> if not "DavesField" in pf.h.field_list:
> add_field(...)
add_field is the same one I've been using from lagos?
I have some datasets that have this field, some that don't, all being
used at the same time. Can I sometimes add the field, sometimes not?
Thanks a bunch,
d.
>
> Hope that helps!
>
> -Matt
>
> On Wed, May 27, 2009 at 2:45 PM, david collins <antpuncher at gmail.com> wrote:
>> Hi--
>>
>> I have a derived quantity that I only write to disk in some
>> simulations. Is there a way to check for the existence of a field in
>> the data set, so that if it doesn't exist I can derive it?
>>
>> Thanks,
>> d.
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>>
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