[yt-users] add_gradient_field

[John Regan]

Hi All,

Just wondering why the snippet of code below fails:

ds = yt.load("......./galaxy0030/galaxy0030")

dd = ds.all_data()
grad_fields = ds.add_gradient_fields(("gas","gravitational_potential"))
#for i in sorted(ds.derived_field_list):
#    print(i)
print dd["gravitational_potential_gradient_x"]


I see the gradient field (4 in total) have been added to the field list but
I can't access the field.

Error:
TypeError: only length-1 arrays can be converted to Python scalars

Cheers,
John
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