3,1 表示最外层括号中有3条数据,2个逗号
torch的数据维度表示,从外向里表示,[3,1],表示外面有3行1列
import torch
import torch.nn as nn
import torch.nn.functional as F
data = torch.randn(3,1,6)
data2 = torch.randn(3, 1)
print(data2.size())
print(data2)
data2 = torch.randn(1, 3)
print(data2.size())
print(data2)
torch.Size([3, 1])
tensor([[ 1.5015],
[-1.8209],
[ 0.9194]])
torch.Size([1, 3])
tensor([[ 1.4510, -1.3262, -0.5420]])
target的第2维和data的第3维数量要保持一致:否则报错:
import torch
import torch.nn as nn
import torch.nn.functional as F
data = torch.randn(3,3,2)
target = torch.tensor([[1,1],[0,1],[0,1]])
print(data.size(),target.size())
n = data.size(0)
c = data.size(1)
out_size =