numpy.ma.count(a, axis=None)[source]
Count the non-masked elements of the array along the given axis.
Parameters: |
axis : int, optional Axis along which to count the non-masked elements. If |
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Returns: |
result : int or ndarray If |
See also
count_masked
>>> import numpy.ma as ma >>> a = ma.arange(6).reshape((2, 3)) >>> a[1, :] = ma.masked >>> a masked_array(data = [[0 1 2] [-- -- --]], mask = [[False False False] [ True True True]], fill_value = 999999) >>> a.count() 3
When the axis
keyword is specified an array of appropriate size is returned.
>>> a.count(axis=0) array([1, 1, 1]) >>> a.count(axis=1) array([3, 0])
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https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.ma.count.html