| set_basis
						Sets an initial basis of the lp. 
						unsigned char set_basis(lprec *lp, int *bascolumn, unsigned char nonbasic); 
						Return Value 
						set_basis returns TRUE if provided basis was set. FALSE if not. If FALSE then provided data was invalid.
					 
						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 
						bascolumn 
						An array with 1+get_Nrows or 1+get_Nrows+get_Ncolumns
						elements that specifies the basis. 
						nonbasic 
						If FALSE, then bascolumn must have 1+get_Nrows
						elements and only contains the basic variables. If TRUE, then bascolumn must
						have 1+get_Nrows+get_Ncolumns
						elements and will also contain the non-basic variables. 
						Remarks 
						The set_basis function sets an initial basis of the lp.The array receives the basic variables and if nonbasic is TRUE, then
						also the non-basic variables. If an element is less then zero then it means on
						lower bound, else on upper bound.
 Element 0 of the array is unused.
 The default initial basis is bascolumn[x] = -x.
 Each element represents a basis variable. If the absolute value is between 1
						and get_Nrows, it represents a slack variable and
						if it is between get_Nrows+1 and 
							get_Nrows+get_Ncolumns then it
						represents a regular variable. If the value is negative, then the variable is
						on its lower bound. If positive it is on its upper bound.
 Setting an initial basis can speed up the solver considerably. It is the
						starting point from where the algorithm continues to find an optimal solution.
 When a restart is done, lp_solve continues at the last basis, except if 
							set_basis, default_basis or read_basis is called.
 
						Example #include <stdio.h>
#include <stdlib.h>
#include "lp_lib.h"
int main(void)
{
  lprec *lp;
  int bascolumn[1+2]; /* must be 1 more then number of rows ! */
  /* Create a new LP model */
  lp = make_lp(2, 0);
  if(lp == NULL) {
    fprintf(stderr, "Unable to create new LP model\n");
    return(1);
  }
  bascolumn[0] = 0;
  bascolumn[1] = -1;
  bascolumn[2] = -2;
  set_basis(lp, bascolumn, FALSE);
  delete_lp(lp);
  return(0);
}
 
						lp_solve API reference 
						See Also make_lp, copy_lp,
						read_lp, read_LP, read_mps,
							read_freemps, read_MPS, read_freeMPS, read_XLI, get_basis, default_basis, read_basis, write_basis, guess_basis, get_basiscrash, set_basiscrash |