> Suppose we have A of size 9x2 and b of size 9x1 > How would I solve Ax = b for x using GSL? Which method to use?
Probably gsl_linalg_QR_lssolve. You can read up on the QR routines at http://www.gnu.org/software/gsl/manual/html_node/QR-Decomposition.html. - Rhys
