How to convert Zero to Nan in the array?

Question

I used the temp[temp==0] = np.nan, but I got this Error:

IndexError: 2-dimensional boolean indexing is not supported.

Answer 1

I'd use where, to avoid having to drop down to numpy:

In [35]: d
Out[35]: 
<xarray.DataArray (dim_0: 2, dim_1: 3)>
array([[0, 1, 2],
       [3, 4, 5]])
Dimensions without coordinates: dim_0, dim_1

In [36]: d.where(d != 0)
Out[36]: 
<xarray.DataArray (dim_0: 2, dim_1: 3)>
array([[nan,  1.,  2.],
       [ 3.,  4.,  5.]])
Dimensions without coordinates: dim_0, dim_1

and which will automatically move to floats if necessary.