From help-octave-request at bevo dot che dot wisc dot edu Wed Oct 22 02:25:05 1997 Subject: How do I solve some over-determined Linear Equations? From: john To: help-octave at bevo dot che dot wisc dot edu Date: Wed, 22 Oct 1997 08:24:04 +0100 (BST) I have some linear equations: ( (v1.*x) + (v2.*y) ) * A = (v3.*z) * B ( (w1.*x) + (w2.*y) ) * A = (w3.*z) * B where v1, v2, v3, w1, w2 and w3 are known row vectors (with complex numbers) A and B are matrices, usually with more columns than rows. (real) x, y, z are row vectors; x known, y and z unknown. I seek to solve for y and z. What is the appropriate way to use Octave to solve these? In truth each side represents a continuous function on [0,2pi] with respect to different sets of orthogonal basis functions. The matrices A and B are the Fourier Coefficients of these orthogonal functions, and I can calculate as many or few as I feel inclined. Thanks for any advice, John john at arrows dot demon dot co dot uk