cs_ltsolve.c
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00001 #include "cs.h"
00002 /* solve L'x=b where x and b are dense.  x=b on input, solution on output. */
00003 int cs_ltsolve (const cs *L, double *x)
00004 {
00005     int p, j, n, *Lp, *Li ;
00006     double *Lx ;
00007     if (!CS_CSC (L) || !x) return (0) ;                     /* check inputs */
00008     n = L->n ; Lp = L->p ; Li = L->i ; Lx = L->x ;
00009     for (j = n-1 ; j >= 0 ; j--)
00010     {
00011         for (p = Lp [j]+1 ; p < Lp [j+1] ; p++)
00012         {
00013             x [j] -= Lx [p] * x [Li [p]] ;
00014         }
00015         x [j] /= Lx [Lp [j]] ;
00016     }
00017     return (1) ;
00018 }
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hogman_minimal
Author(s): Maintained by Juergen Sturm
autogenerated on Wed Dec 26 2012 15:36:47