[Octave-bug-tracker] [bug #37507] pseudoinverse with sparse matrices

[Muhali]

URL:
  <http://savannah.gnu.org/bugs/?37507>

                 Summary: pseudoinverse with sparse matrices
                 Project: GNU Octave
            Submitted by: muhali
            Submitted on: Thu 04 Oct 2012 02:23:14 PM PDT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.3
        Operating System: GNU/Linux

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Details:

The following shows that there is a problem with the sparse matrix
pseudoinverse.


octave>> A = [2 ; 1]; B = [2 -1 0 ; 3 0 1];
octave>> A \ B
ans =

   1.400  -0.400   0.200

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

octave>> sparse(A) \ B
ans = [](0x0)


I am using 3.6.3 with no extra sparse matrix libraries (AMD,...).




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