How to update a segment in the matrix in Torch/Lua?

Question

I'm trying to update a segment in the matrix in Torch, but I have not got a simple function to do it.

For example: $ x = torch.Tensor(5, 6):zero() -- create a matrix

and I tried to update a segment in the matrix like:

$ x[{ 2,{2,4} }]= {1, 2, 3} and

$ x[{ 2,{2,4} }]:fill({1,2,3})

Neither of them works.

Should I just do it with a loop or does there exist a simple function?

Answer 1

Simply create a tensor instead of trying to directly assign a table:

x[{2, {2,4}}] = torch.Tensor({1, 2, 3})