[SciPy-user] howto extract positions and values of non-zeros from array (flat)?
dmitrey
openopt at ukr.net
Thu Aug 30 08:58:22 EDT 2007
I have one-dimensional array with zeros and non-zeros, like
a = array((1,0,2,3,4,0,5,0))
I need to obtain positions of non-zeros and corresponding values
ind = array((0, 2, 3,4, 6))
val = array((1,2,3,4,5))
what's the simplest way, that uses only numpy?
in MATLAB it would look like [ind, val] = find(a)
Regards, D.
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