numpy.ma.flatnotmasked_edges()

numpy.ma.flatnotmasked_edges(a) [source]

Find the indices of the first and last unmasked values.

Expects a 1-D MaskedArray, returns None if all values are masked.

Parameters:

Parameters:	a : array_like Input 1-D `MaskedArray`
Returns:	edges : ndarray or None The indices of first and last non-masked value in the array. Returns None if all values are masked.

a : array_like

Returns:

edges : ndarray or None

The indices of first and last non-masked value in the array. Returns None if all values are masked.

Only accepts 1-D arrays.

>>> a = np.ma.arange(10)
>>> flatnotmasked_edges(a)
[0,-1]

>>> mask = (a < 3) | (a > 8) | (a == 5)
>>> a[mask] = np.ma.masked
>>> np.array(a[~a.mask])
array([3, 4, 6, 7, 8])

>>> flatnotmasked_edges(a)
array([3, 8])

>>> a[:] = np.ma.masked
>>> print(flatnotmasked_edges(ma))
None

Links:

doc_NumPy

2025-01-10 15:47:30

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