Re: least square solution of b = A * x with a very huge A matrix

[andrea console]

My test A matrix is 600,000 x 2,000,000 (overdetermined system) , with 6,000,000 non-zero-float-16 values, but in real conditions it can be pretty much bigger

Also consider that I have always a good approximation of the solution to use, ad example for an iterative method.

2013/5/29 Nir Krakauer <address@hidden>

How big is your A matrix? Is it possible to give a self-contained
example that shows this error?

There is work being started on improving Octave's capabilities for
solving large sparse linear problems, and understanding what is going
wrong in your problem may help with this.