如果是一维数组,可以使用a = a[:,:,-1]实现反转!
numpy.flip(m, axis=None)
Reverse the order of elements in an array along the given axis.
The shape of the array is preserved, but the elements are reordered.
把m在axis维度进行切片,并把这个维度的index进行颠倒
示例
随机生成一个二维数组
1 2 |
|
[[5 8 6]
[3 1 7]
[8 7 8]]
axis=0:上下翻转,意味着把行看成整体,行的顺序发生颠倒,每一行的元素不发生改变
1 |
|
[[8 7 8]
[3 1 7]
[5 8 6]]
axis=1:左右翻转,意味着把列看成整体,列的顺序发生颠倒,每一列的元素不发生改变
1 |
|
[[6 8 5]
[7 1 3]
[8 7 8]]