sparse matrix division (least squares)

[Rishi Amrit]

Hi,

    I have two sparse matrices (say A and B). 

> size(A)
ans = 
    2400  2400

> size(B)
ans =
    2400 2440

I wish to implement the least squares operator : A\B

When I run this in MATLAB, I get 

> size(A\B)
ans =
   2440  2400

and A\B is a sparse matrix.

When I implement this in octave, I get

> A\B
ans = Compressed Column Sparse (rows = 0, cols =0, nnz = 0)

which is empty.

Is there a separate function in octave for this operation on sparse matrices ?

Thanks,

Rishi