set_epsb

Specifies the value that is used as a tolerance for the Right Hand Side (RHS) to determine whether a value should be considered as 0.

void set_epsb(lprec *lp, REAL epsb);

Return Value

set_epsb has no return value.

Parameters

lp

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

epsb

The value that is used as a tolerance for the Right Hand Side (RHS) to determine whether a value should be considered as 0.

Remarks

The set_epsb function specifies the value that is used as a tolerance for the Right Hand Side (RHS) to determine whether a value should be considered as 0.
Floating-point calculations always result in loss of precision and rounding errors. Therefore a very small value (example 1e-99) could be the result of such errors and should be considered as 0 for the algorithm. epsb specifies the tolerance to determine if a RHS value should be considered as 0. If abs(value) is less than this epsb value in the RHS, it is considered as 0.
The default epsb value is 5.01e-9

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_epsb(lp, 1.0e-8); /* sets epsb to 1e-8 */

  delete_lp(lp);
  return(0);
}

lp_solve API reference

See Also make_lp, read_lp, read_LP, read_lpt, read_LPT, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI, get_epsb, set_infinite, get_infinite, set_epsilon, get_epsilon, set_epsd, get_epsd, set_epsel, get_epsel, get_epspivot, set_epspivot, set_epsperturb, get_epsperturb, set_mip_gap, get_mip_gap