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也算是学习中的小总结
2022-07-06 04:32:00 【成娃子】
#以下代码都是在jupyter notebook中运行的
import torch
c=torch.arange(20).reshape(2,5,2)
c,c.sum(axis=0) #(2,5,2)第一个2消失,两个(5,2)相加
#运行结果
(tensor([[[ 0, 1],
[ 2, 3],
[ 4, 5],
[ 6, 7],
[ 8, 9]],
[[10, 11],
[12, 13],
[14, 15],
[16, 17],
[18, 19]]]),
tensor([[10, 12],
[14, 16],
[18, 20],
[22, 24],
[26, 28]]))
c=torch.arange(20).reshape(2,5,2)
c,c.sum(axis=1) #(2,5,2)第二个5消失,两个(5,2)变成(1,2)再相加
#运行结果
(tensor([[[ 0, 1],
[ 2, 3],
[ 4, 5],
[ 6, 7],
[ 8, 9]],
[[10, 11],
[12, 13],
[14, 15],
[16, 17],
[18, 19]]]),
tensor([[20, 25],
[70, 75]]))
c=torch.arange(20).reshape(2,5,2)
c,c.sum(axis=2) #(2,5,2)第三个2消失,变成(2,5)
#运行结果
(tensor([[[ 0, 1],
[ 2, 3],
[ 4, 5],
[ 6, 7],
[ 8, 9]],
[[10, 11],
[12, 13],
[14, 15],
[16, 17],
[18, 19]]]),
tensor([[ 1, 5, 9, 13, 17],
[21, 25, 29, 33, 37]]))
c=torch.arange(20).reshape(2,5,2)
c,c.sum(axis=1,keepdims=True).shape
#运行截图
(tensor([[[ 0, 1],
[ 2, 3],
[ 4, 5],
[ 6, 7],
[ 8, 9]],
[[10, 11],
[12, 13],
[14, 15],
[16, 17],
[18, 19]]]),
torch.Size([2, 1, 2]))
线性回归模型的步骤
1.生成数据集。
2.读取数据集。
3.初始化模型参数。
4.定义模型
5.损失函数
6.优化算法
7.进行训练
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