|Spot operator: opSpot/pcg||Spot Home Page|
PCG Preconditioned Conjugate Gradients Method. X = pcg(A,B) attempts to solve the symmetric positive-definite linear system A*X=B via the PCG method. This routine is simply a wrapper to Matlab's own PCG routine, and the argument list variations described in Matlab's PCG documentation are also allowed here. The usage is identical to Matlab's default version, except that the first argument must be a Spot operator.