is_piv_rule

Checks if the specified pivot rule is active.

unsigned char is_piv_rule(lprec *lp, int rule);

Return Value

is_piv_rule returns TRUE if the specified pivot rule is active, else FALSE

Parameters

Pointer to previously created lp model. See return value of make_lp, read_lp, read_LP, read_lpt, read_LPT, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI

rule

Can be one of the following values:

PRICER_FIRSTINDEX (0)	Select first
PRICER_DANTZIG (1)	Select according to Dantzig
PRICER_DEVEX (2)	Devex pricing from Paula Harris
PRICER_STEEPESTEDGE (3)	Steepest Edge

Remarks

This rule can influence solving times considerably. Depending on the model one rule can be best and for another model another rule.
The default is PRICER_DEVEX (2).

Example

#include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"

int main(void)
{
  lprec *lp;
  unsigned char piv_rule;

  /* Create a new LP model */
  lp = make_lp(0, 0);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }

  piv_rule = is_piv_rule(lp, PRICER_FIRSTINDEX);

  delete_lp(lp);
  return(0);
}

lp_solve API reference