[Numpy-discussion] numpy.ma.arg{min,max}
Christopher Barker
Chris.Barker at noaa.gov
Fri Apr 10 18:16:06 EDT 2009
Adam Oliner wrote:
> The documentation for numpy.ma.argmin says:
> "Returns array of indices of the maximum values along the given axis."
>
> Aside from probably meaning to say the 'minimum' values,
that's a typo...
> it also doesn't seem to return an array:
it does if you use a higher rank array, and specify an axis:
>>> a
array([[ 0.643502 , 0.83867769, 0.97762954, 0.49686553],
[ 0.37798796, 0.69300396, 0.06683333, 0.3457077 ],
[ 0.51357262, 0.29095034, 0.42811108, 0.72644421],
[ 0.5977396 , 0.64992292, 0.53068753, 0.46386281]])
>>> np.argmin(a, 0)
array([1, 2, 1, 1])
>>> np.argmin(a, 1)
array([3, 2, 1, 3])
argmin(a, axis=None)
Return array of indices to the minimum values along the given axis.
Parameters
----------
a : {array_like}
Array to look in.
axis : {None, integer}
If None, the index is into the flattened array, otherwise along
the specified axis
--
Christopher Barker, Ph.D.
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Chris.Barker at noaa.gov
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