[Numpy-discussion] index partition
Alan G Isaac
alan.isaac at gmail.com
Sat Apr 12 16:47:19 EDT 2014
From a 1d array, I want two arrays of indexes:
the first for elements that satisfy a criterion,
and the second for elements that do not. Naturally
there are many ways to do this. Is there a preferred way?
As a simple example, suppose for array `a` I want
np.flatnonzero(a>0) and np.flatnonzero(a<=0).
Can I get them both in one go?
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