Sets the desired combination of primal and dual simplex algorithms.
void set_preferdual(lprec *lp, unsigned char dodual);
Return Value
set_preferdual has no return value.
Parameters
lp
Pointer to previously created lp model. See return value of make_lp, copy_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI
dodual
When TRUE, the simplex strategy is set to SIMPLEX_DUAL_DUAL.
When FALSE, the simplex strategy is set to SIMPLEX_PRIMAL_PRIMAL.
See also get_simplextype
Remarks
The set_preferdual function sets the desired combination of primal and dual simplex algorithms.
set_preferdual with dodual = TRUE is a shortcut for set_simplextype(SIMPLEX_DUAL_DUAL)
set_preferdual with dodual = FALSE is a shortcut for set_simplextype(SIMPLEX_PRIMAL_PRIMAL)
The default is SIMPLEX_DUAL_PRIMAL (6).
Example
#include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"
int main(void)
{
lprec *lp;
/* Create a new LP model */
lp = make_lp(0, 0);
if(lp == NULL) {
fprintf(stderr, "Unable to create new LP model\n");
return(1);
}
set_preferdual(lp, TRUE);
delete_lp(lp);
return(0);
}
See Also make_lp, copy_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI, get_simplextype