Re: sparse least squares

Hi, Thanks for your answer.

My matrix A is -
rectangular (something like 4n x n) ,
sparse,
unsymmetric

umfpack works only with square as far as I know (am I wrong?)
lsqr - gives an ok results but I was wondering if there is some package
in C that does something similar to what Matlab does for solving such
system (and they do sparse qr).

Thanks
-kem

.

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