關於pytorch中torch.mean函數在二維上的用法實例

x=torch.arange(15).view(5,3)
x_mean=torch.mean(x,dim=0,keepdim=True)
x_mean0=torch.mean(x,dim=1,keepdim=True)
print('before bn:')
print(x)
print('x_mean:')
print(x_mean)
print('x_mean0:')
print(x_mean0) 

運行結果:

before bn:

  0   1   2
  3   4   5
  6   7   8
  9  10  11
 12  13  14
[torch.FloatTensor of size 5x3]

x_mean:

 6  7  8
[torch.FloatTensor of size 1x3]

x_mean0:

  1
  4
  7
 10
 13
[torch.FloatTensor of size 5x1]