Error: Runtime error: expected scalar type Float but found Double
w_true=torch.tensor([2,-3.4]).T
b_true=4.2
feature = torch.from_numpy(np.random.normal(0,1,(num_input,num_example)))
#feature = torch.float32(feature)
labels = torch.matmul(w_true.T,feature)+b_true
Problem: runtime error: expected scalar type float but found double
reason: NP random. The data generated by Rand() is float64, while torch defaults to float32, so the problem arises
solution
feature = torch.from_numpy(np.float32(np.random.normal(0,1,(num_input,num_example))))
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