Returns the DoubleStorage used to store all the elements of the Tensor. Basically, a Tensor is a particular way of viewing a Storage. 

> x = torch.Tensor(4,5)
> s = x:storage()
> for i=1,s:size() do -- fill up the Storage
>> s[i] = i
>> end
> print(x) -- s is interpreted by x as a 2D matrix

  1   5   9  13  17
  2   6  10  14  18
  3   7  11  15  19
  4   8  12  16  20
[torch.Tensor of dimension 4x5]