Eric Firing wrote: > Ryan May wrote: >> Hi, >> >> I just noticed this and found it surprising: >> >> In [8]: from numpy import ma >> >> In [9]: a = ma.array([1,2,3,4],mask=[False,False,True,False],fill_value=0) >> >> In [10]: a >> Out[10]: >> masked_array(data = [1 2 -- 4], >> mask = [False False True False], >> fill_value=0) >> >> >> In [11]: a[2] >> Out[11]: >> masked_array(data = --, >> mask = True, >> fill_value=1e+20) >> >> In [12]: np.__version__ >> Out[12]: '1.1.0' >> >> Is there a reason that the fill_value isn't inherited from the parent array? > > There was a thread about this a couple months ago, and Pierre GM > explained it. I think the point was that indexing is giving you a new > masked scalar, which is therefore taking the default mask value of the > type. I don't see it as a problem; you can always specify the fill > value explicitly when you need to.
I thought it sounded familiar. You're right, it's not a big problem, it just seemed unintuitive. Thanks for the explaination. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
