I am using the BiCGSTAB solver with a preconditioner to solve for multiple right hand sides. I call compute before solving the systems, but also saw the analyzePattern and factorize methods in the documentation. Does compute also call analyzePattern and factorize, or should I call these methods separately?

compute is a shortcut for analyzePattern and factorize: http://eigen.tuxfamily.org/dox-devel/gr ... tml#title5, and for iterative solvers, it boills down to the computation of pre conditioner.