set_obj_fn, str_set_obj_fn

Set the objective function (row 0) of the matrix.

int set_obj_fn(lprec *lp, REAL *row);

int str_set_obj_fn(lprec *lp, char *str_row);

Return Value

set_obj_fn and str_set_obj_fn returns TRUE (1) if the operation was successful. A return value of FALSE (0) indicates an error.
lp->spx_status specifies what error occurred.

Parameters

Pointer to previously created lp model. See return value of make_lp, copy_lp, read_lp, read_lp_file, read_LP, read_mps, read_MPS

row

An array with column elements that contains the values of the objective function.

str_row

A string with column elements that contains the values of the objective function. Each element must be separated by space(s).

Remarks

The set_obj_fn, str_set_obj_fn functions set all values of the objective function at once.
Note that element 0 of the array is not considered (i.e. ignored). Column 1 is element 1, column 2 is element 2, ...

Example

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

int main(void)
{
  lprec *lp;
  REAL row[1+2]; /* must be 1 more then number of columns ! */

  /* Create a new LP model */
  lp = make_lp(0, 2);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }

  row[1] = 1.0;
  row[2] = 2.0;
  set_obj_fn(lp, row);  /* constructs the obj: +v_1 +2 v_2 */

  delete_lp(lp);
  return(0);
}

lp_solve API reference