(六)Tensor维度变换

操作

• View/reshape
  保持维度大小不变，改变shape
• Squeeze/unsqueeze
  删减维度/增加维度
• Transpose/t/permute
  多维矩阵转置
• Expand/repeat
  维度扩展

1.View/reshape

image.png

2.Squeeze/unsqueeze

unsqueeze(position)
position范围：[-a.dim()-1, a.dim()+1)

example
example

squeeze

image.png

3.Transpose/t/permute

• **.t() **只能对2Dtensor操作

  
  2D
• Transpose
  QQ截图20200107170616.png
• permute

permute

4. Expand/repeat

• Expand: broadcasting
  推荐使用
• Repeat: memory copied
  复制数据

Expand
Repeat