numpy.ma.flatnotmasked_edges#
- 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:
- aarray_like
Input 1-D
MaskedArray
- Returns:
- edgesndarray or None
The indices of first and last non-masked value in the array. Returns None if all values are masked.
See also
Notes
Only accepts 1-D arrays.
Examples
>>> a = np.ma.arange(10) >>> np.ma.flatnotmasked_edges(a) array([0, 9])
>>> mask = (a < 3) | (a > 8) | (a == 5) >>> a[mask] = np.ma.masked >>> np.array(a[~a.mask]) array([3, 4, 6, 7, 8])
>>> np.ma.flatnotmasked_edges(a) array([3, 8])
>>> a[:] = np.ma.masked >>> print(np.ma.flatnotmasked_edges(a)) None