torch.linspace
torch.linspace(start, end, steps) returns a one-dimensional tensor of equally spaced points between [start, end]。steps默认值是100。
torch.rand
torch.rand(size) returns a tensor filled with random numbers from a uniform distribution on the interval [0, 1).
torch.randn
torch.randn(size) returns a tensor filled with random numbers from a normal distribution with mean `0` and variance `1` (also called the standard normal distribution).
torch.normal
torch.normal returns a tensor of random numbers drawn from separate normal distributions whose mean and standard deviation are given.
The arguments `mean` is a tensor with the mean of each output element's normal distribution.
The arguments `std` is a tensor with the standard deviation of each output element's normal distribution.
torch.normal的参数给定方法有很多种：
第一种：给定mean (Tensor)和std (Tensor)
第二种：给定mean(float)和std (Tensor)
第三种：给定mean (Tensor)和std (float)，std也可不给，若不给定，则默认为1.0
第四种：给定mean (float)、std (float)和size(int...)
参考文献：PyTorch帮助文档