PyTorch - torch.eq、torch.ne、torch.gt、torch.lt、torch.ge、torch.leflyfishtorch.eq、torch.ne、torch.gt、torch.lt...、torch.ge、torch.le 以上全是简写 参数是input, other, out=None 逐元素比较input和other 返回是torch.BoolTensor?...import torcha=torch.tensor([[1, 2], [3, 4]])b=torch.tensor([[1, 2], [4, 3]])print(torch.eq(a,b))#equals...# tensor([[ True, True],# [False, False]])print(torch.ne(a,b))#not equal to# tensor([[False,...(torch.ge(a,b))#greater than or equal to# tensor([[ True, True],# [False, True]])print(torch.le
然后执行安装: wget https://data.pyg.org/whl/torch-1.12.0%2Bcu116/torch_sparse-0.6.15-cp39-cp39-linux_x86_64....whl wget https://data.pyg.org/whl/torch-1.12.0%2Bcu116/torch_scatter-2.0.9-cp39-cp39-linux_x86_64.whl...wget https://data.pyg.org/whl/torch-1.12.0%2Bcu116/torch_cluster-1.6.0-cp39-cp39-linux_x86_64.whl wget...https://data.pyg.org/whl/torch-1.12.0%2Bcu116/torch_spline_conv-1.2.1-cp39-cp39-linux_x86_64.whl pip..._64.whl pip install torch_cluster-1.6.0-cp39-cp39-linux_x86_64.whl pip install torch_spline_conv-1.2.1
torch.randn()产生大小为指定的,正态分布的采样点,数据类型是tensortorch.mean()torch.mean(input) 输出input 各个元素的的均值,不指定任何参数就是所有元素的算术平均值...,指定参数可以计算每一行或者 每一列的算术平均数例如:a=torch.randn(3) #生成一个一维的矩阵b=torch.randn(1,3) #生成一个二维的矩阵print(a)print(b)torch.mean...(4,4)print(a)c=torch.mean(a,dim=0,keepdim=True)print(c)d=torch.mean(a,dim=1,keepdim=True)print(d)结果:tensor...torch.pow()对输入的每分量求幂次运算a=torch.tensor(3)b=torch.pow(a,2)print(b)c=torch.randn(4)print(c)d=torch.pow(c...()torch.matmul 是做矩阵乘法例如:a=torch.tensor([1,2,3])b=torch.tensor([3,4,5])torch.matmul(a, b)结果:tensor(26)
MachineLP的Github(欢迎follow):https://github.com/MachineLP MachineLP的博客目录:小鹏的博客目录 本小节介绍torch的基础操作和流程: (1...代码部分: (0)import # coding=utf-8 import torch import torchvision import torch.nn as nn import numpy as...np import torchvision.transforms as transforms print (torch....__version__) (1)计算梯度值 # 创建tensor x = torch.tensor(1, requires_grad=True) w = torch.tensor(2, requires_grad...# 保存和加载模型 torch.save(resnet, 'model.ckpt') model = torch.load('model.ckpt') # 只保存和加载模型参数 torch.save(
1. 2D 卷积 class torch.nn.Conv2d(in_channels, out_channels, kernel_size, stride=1, padding=0, dilation=...array} Wout=floor((Win+2×padding[1]−dilation[1]×(kernerl_size[1]−1)−1)/stride[1]+1) 2. 2D 反卷积 class torch.nn.ConvTranspose2d
torch.clamp(input, min, max, out=None) → Tensor 将 input 张量中的每个元素值截断到区间 [min, max] 中。...torch.flip(input, dims) → Tensor 将 input 张量沿着列表/元组 dims 中的每一个维度依次翻转。...torch.Tensor.contiguous(memory_format=torch.contiguous_format) → Tensor 返回一个内存连续且有相同数据的 Tensor,如果原 Tensor...torch.Tensor.permute(*dims) → Tensor 根据 dims 给定的维度顺序对张量进行维度换位。...torch.Tensor.transpose(dim0, dim1) → Tensor 对 dim0 和 dim1 两个维度换位。
torch.Storage是单个数据类型的一维数组。每个torch.Tensor都有一个对应的相同数据类型的存储。...class torch.FloatStorage[source]bfloat16()将这个存储变为bfloat16类型。
torch.clamp(input, min, max, out=None) → Tensor Clamp all elements in input into the range [ min, max...(4) >>> a tensor([-1.7120, 0.1734, -0.0478, -0.0922]) >>> torch.clamp(a, min=-0.5, max=0.5) tensor([...-0.5000, 0.1734, -0.0478, -0.0922]) torch.clamp(input, *, min, out=None) → Tensor Clamps all elements...(4) >>> a tensor([-0.0299, -2.3184, 2.1593, -0.8883]) >>> torch.clamp(a, min=0.5) tensor([ 0.5000,...0.5000, 2.1593, 0.5000]) torch.clamp(input, *, max, out=None) → Tensor Clamps all elements in input
切分维度 import torch a = torch.arange(10).reshape(5,2) print(a.shape) aa = torch.split(a, 2) print(aa...) b,c,d = torch.split(a, 2) print(b.shape,c.shape,d.shape) print('*' * 30) e,f = torch.split(a, [1,4]...[0, 1], [2, 3]]), tensor([[4, 5], [6, 7]]), tensor([[8, 9]])) torch.Size([2, 2]) torch.Size...([2, 2]) torch.Size([1, 2]) ****************************** torch.Size([1, 2]) torch.Size([4, 2]) tensor..., unsure.shape) Result: torch.Size([1, 3, 512, 512]) torch.Size([1, 1, 512, 512]) torch.Size([1, 1, 512
目录class torch.no_grad[source]----class torch.no_grad[source]不能进行梯度计算的上下文管理器。...例:>>> x = torch.tensor([1], requires_grad=True)>>> with torch.no_grad():......y = x * 2>>> y.requires_gradFalse>>> @torch.no_grad()... def doubler(x):...
先看函数参数:torch.flatten(input, start_dim=0, end_dim=-1)input: 一个 tensor,即要被“推平”的 tensor。...我们要先来看一下 tensor 中的 shape 是怎么样的:t = torch.tensor([[[1, 2, 2, 1], [3, 4, 4, 3],...4, 4, 3], [1, 2, 3, 4]], [[5, 6, 6, 5], [7, 8, 8, 7], [5, 6, 7, 8]]])torch.Size...示例代码:x = torch.flatten(t, start_dim=1)print(x, x.shape)y = torch.flatten(t, start_dim=0, end_dim=1)print...pytorch中的 torch.nn.Flatten 类和 torch.Tensor.flatten 方法其实都是基于上面的 torch.flatten 函数实现的。
1.torch.isfinite()import torchnum = torch.tensor(1) # 数字1res = torch.isfinite(num)print(res)'''输出:tensor...(True)'''这个num必须是tensorimport torchnum = torch.tensor(float('inf')) # 正无穷大res = torch.isfinite(num)print...(res)'''输出:tensor(False)'''import torchnum = torch.tensor(float('-inf')) # 负无穷大res = torch.isfinite(num...)print(res)'''输出:tensor(False)'''import torchnum = torch.tensor(float('nan')) # 空res = torch.isfinite...(num)print(res)'''输出:tensor(False)'''2.torch.isnan()import torchres=torch.isnan(torch.tensor([1, float
问题 ModuleNotFoundError: No module named 'torch' python下安装torch 我安装了几个线下版本的,但是很多都是各种类似【ERROR: rasterio...镜像我用的是华为的镜像 ###python 3.6 + torch1.6 pip install torch==1.6.0+cu101 torchvision==0.7.0+cu101 torchaudio...==0.6.0 -f https://download.pytorch.org/whl/torch_stable.html 如下是整个安装步骤。
>>> y=torch.range(1,6)>>> ytensor([1., 2., 3., 4., 5., 6.])>>> y.dtypetorch.float32>>> z=torch.arange...(1,6)>>> ztensor([1, 2, 3, 4, 5])>>> z.dtypetorch.int64总结:torch.range(start=1, end=6) 的结果是会包含end的, 而torch.arange
requires_grad=True 要求计算梯度 requires_grad=False 不要求计算梯度 with torch.no_grad()或者@torch.no_grad()中的数据不需要计算梯度...,也不会进行反向传播 model.eval() # 测试模式with torch.no_grad(): pass@torch.no_grad
x1 ,y1 = torch.meshgrid(x,y) 参数是两个,第一个参数我们假设是x,第二个参数假设就是y 输出的是两个tensor,size就是x.size * y.size(行数是x的个数,
DetectionVideo classificationtorchvision.opstorchvision.transforms Transforms on PIL ImageTransforms on torch
torch.div(a, b) ,a和b的尺寸是广播一致的,而且a和b必须是类型一致的,就是如果a是FloatTensor那么b也必须是FloatTensor,可以使用tensor.to(torch.float64...>>> a = torch.randn(4, 4)>>> atensor([[-0.3711, -1.9353, -0.4605, -0.2917], [ 0.1815, -1.0111,..., [ 0.1062, 1.4581, 0.7759, -1.2344], [-0.1830, -0.0313, 1.1908, -1.4757]])>>> b = torch.randn...(4)>>> btensor([ 0.8032, 0.2930, -0.8113, -0.2308])>>> torch.div(a, b)tensor([[-0.4620, -6.6051, 0.5676...>>> a = torch.randn(5)>>> atensor([ 0.3810, 1.2774, -0.2972, -0.3719, 0.4637])>>> torch.div(a, 0.5)
如何使用一个优化器为了使用torch.optim,你必须构建一个优化对象,那将会保持现有的状态,并且基于计算的来更新参数。...zero_grad()[source]清楚所有优化后的torch.Tensor的梯度。...class torch.optim.Adam(params, lr=0.001, betas=(0.9, 0.999), eps=1e-08, weight_decay=0, amsgrad=False...如何调整学习率torch.optim.lr_scheduler提供了几种基于epoch数调整学习速率的方法。torch.optim.lr_scheduler。...默认值:1 例:>>> optimizer = torch.optim.SGD(model.parameters(), lr=0.1, momentum=0.9)>>> scheduler = torch.optim.lr_scheduler.CyclicLR
(), show docstring and examples through torch.hub.help() and load the pre-trained models using torch.hub.load...The default value of model_dir is $TORCH_HOME/checkpoints where environment variable $TORCH_HOME defaults...to $XDG_CACHE_HOME/torch....variable TORCH_HOME is set..../hub where environment variable $TORCH_HOME defaults to $XDG_CACHE_HOME/torch.
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