numpy.ma.flatnotmasked_edges() function | Python

numpy.ma.flatnotmasked_edges() function find the indices of the first and last unmasked values.

Syntax : numpy.ma.flatnotmasked_edges(arr)

Parameters :
arr : [ array_like] Input 1-D MaskedArray.

Return : [ndarray or None] The indices of first and last non-masked value in the array. Returns None if all values are masked.

Code #1 :

# Python program explaining
# numpy.ma.flatnotmasked_edges() function

# importing numpy as geek
# and numpy.ma module as ma
import numpy as geek
import numpy.ma as ma

arr = geek.ma.arange(12)

gfg = geek.ma.flatnotmasked_edges(arr)

print (gfg)

Output :

[ 0, 11]

Code #2 :

# Python program explaining
# numpy.ma.flatnotmasked_edges() function

# importing numpy as geek
# and numpy.ma module as ma
import numpy as geek
import numpy.ma as ma

arr = geek.ma.arange(12)
arr[:] = geek.ma.masked

gfg = geek.ma.flatnotmasked_edges(arr)

print (gfg)

Output :

None