Is there a way to get the least squares residuals for qrfact(X)\y without having to compute X*beta, as is given by gels? I believe this should be ||Q2'y||; Q2'y appears to be computed but explicitly zeroed in A_ldiv_B!.
Simon
Is there a way to get the least squares residuals for qrfact(X)\y without having to compute X*beta, as is given by gels? I believe this should be ||Q2'y||; Q2'y appears to be computed but explicitly zeroed in A_ldiv_B!.
Simon