This error occurs when LSTM is used for data training, I convert the numpy data directly to the tensor data type in the torch：

RuntimeError: expected scalar type Double but found Float

Cause analysis:

The data type of the tensor is incorrect

x_train_tensor = torch.from_numpy(x_train)
y_train_tensor = torch.from_numpy(y_train)

Solution:

Convert the original tensor to the torch.float32 type

x_train_tensor = torch.from_numpy(x_train).to(torch.float32)
y_train_tensor = torch.from_numpy(y_train).to(torch.float32)