Python中的 numpy.ma.compress_cols()函数
先决条件: numpy
这个 numpy 内置函数抑制在二维数组中包含屏蔽值的整列。
Syntax: numpy.ma.compress_cols(arr)
Parameters :
arr : [array_like, MaskedArray]
- This parameter holds the array to operate on.
- The array must be a 2D array.
- If no array elements are masked, arr is interpreted as a MaskedArray with mask set to nomask.
Return : Returns the compressed array.
下面是上述函数的实现。
示例 1:
Python3
# importing numpy as geek
import numpy as geek
# defining an array with mask
arr = geek.ma.array(geek.arange(6).reshape(2, 3),
mask=[[1, 0, 0], [0, 0, 0]])
# applying mask to array elements
gfg = geek.ma.compress_cols(arr)
print(gfg)
Python3
# importing numpy as geek
import numpy as geek
# defining array
arr = geek.ma.array(geek.arange(9).reshape(3, 3), mask=[
[1, 0, 0], [1, 0, 0], [0, 0, 0]])
# applying mask to array elements
gfg = geek.ma.compress_cols(arr)
print(gfg)
输出 :
[[1 2]
[4 5]]
示例 2:
蟒蛇3
# importing numpy as geek
import numpy as geek
# defining array
arr = geek.ma.array(geek.arange(9).reshape(3, 3), mask=[
[1, 0, 0], [1, 0, 0], [0, 0, 0]])
# applying mask to array elements
gfg = geek.ma.compress_cols(arr)
print(gfg)
输出 :
[[1 2]
[4 5]
[7 8]]