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: 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.
See also
flatnotmasked_contiguous, notmasked_contiguous, notmasked_edges, clump_masked, clump_unmasked
Notes
Only accepts 1-D arrays.
Examples
>>> 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