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tf.reverse


在之前的博客中我说过,

一维度的矩阵是队列

二维度的矩阵是方阵

三维度的矩阵是大楼

四维度的矩阵是小区

我以三维矩阵来说 tf.reverse的意义,可以把它想象成一座大楼

tf.reverse_倒序

import tensorflow  as tf 
t=tf.constant( [ [[ 0, 1, 2, 3],
[ 4, 5, 6, 7],
[ 8, 9, 10, 11]],
[[ 10, 11, 12, 13],
[ 14, 15, 16, 17],
[ 18, 19, 20, 21]]

])

tf.reverse(t, [0]) 就是楼层互换,顶楼到底楼

tf.reverse(t, [0])
Out[55]:
<tf.Tensor: shape=(2, 3, 4), dtype=int32, numpy=
array([[[10, 11, 12, 13],
[14, 15, 16, 17],
[18, 19, 20, 21]],

[[ 0, 1, 2, 3],
[ 4, 5, 6, 7],
[ 8, 9, 10, 11]]], dtype=int32)>

tf.reverse(t, [1]) 每层的列倒序

tf.reverse(t, [1])
Out[56]:
<tf.Tensor: shape=(2, 3, 4), dtype=int32, numpy=
array([[[ 8, 9, 10, 11],
[ 4, 5, 6, 7],
[ 0, 1, 2, 3]],

[[18, 19, 20, 21],
[14, 15, 16, 17],
[10, 11, 12, 13]]], dtype=int32)>

tf.reverse(t, [1]) 每层的倒行序

tf.reverse(t, [2])
Out[57]:
<tf.Tensor: shape=(2, 3, 4), dtype=int32, numpy=
array([[[ 3, 2, 1, 0],
[ 7, 6, 5, 4],
[11, 10, 9, 8]],

[[13, 12, 11, 10],
[17, 16, 15, 14],
[21, 20, 19, 18]]], dtype=int32)>


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