cs_dropzeros.c

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#include "cs.h"
static int cs_nonzero (int i, int j, double aij, void *other)
{
    return (aij != 0) ;
}
int cs_dropzeros (cs *A)
{
    return (cs_fkeep (A, &cs_nonzero, NULL)) ;  /* keep all nonzero entries */
}