numpy.ma.flatnotmasked_edges — NumPy v1.13 Manual (original) (raw)
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. |
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