Re: sparse matrix division (least squares)

[Rishi Amrit]

On Mon, Mar 30, 2009 at 6:02 PM, Ben Abbott <address@hidden> wrote:

On Mar 30, 2009, at 12:05 PM, Rishi Amrit wrote:

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

What version of Octave are you running?

I am running the latest stable version: 3.0.3

Thanks,

Rishi