pytorch MSELoss参数详解

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最新推荐文章于 2025-06-06 12:58:04 发布

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分类专栏： Pytorch python loss 文章标签： pytorch loss MSELoss

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博客主要对PyTorch中的MSELoss参数进行详细解读，聚焦于信息技术领域中深度学习框架的相关内容，为开发者理解和使用MSELoss提供帮助。

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pytorch MSELoss参数详解

import torch
import numpy as np
loss_fn = torch.nn.MSELoss(reduce=False, size_average=False)
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

loss_fn = torch.nn.MSELoss(reduce=False, size_average=True)
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
loss_fn = torch.nn.MSELoss(reduce=True, size_average=False)
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
loss_fn = torch.nn.MSELoss(reduce=True, size_average=True)
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
loss_fn = torch.nn.MSELoss()##reduce=True, size_average=True
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

loss_fn = torch.nn.MSELoss(reduction = 'none')
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

loss_fn = torch.nn.MSELoss(reduction = 'sum')
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

loss_fn = torch.nn.MSELoss(reduction = 'none')
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)

loss_fn = torch.nn.MSELoss(reduction = 'elementwise_mean')
a=np.array([[1,2],[3,8]])
b=np.array([[5,4],[6,2]])
input = torch.autograd.Variable(torch.from_numpy(a))
target = torch.autograd.Variable(torch.from_numpy(b))
loss = loss_fn(input.float(), target.float())
print(loss)