set_basiscrashDetermines a starting base. void set_basiscrash(lprec *lp, int mode); Return Value None Parameters 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 mode Specifies which basis crash mode is used. Can by any of the following values:
Remarks The set_basiscrash function specifies which basis crash mode must be used. Default is CRASH_NONE. When no base crash is done (the default), the initial basis from which lp_solve starts to solve the model is the basis containing all slack or artificial variables that is automatically associates with each constraint. When base crash is enabled, a heuristic ``crash procedure'' is executed before the first simplex iteration to quickly choose a basis matrix that has fewer artificial variables. This procedure tends to reduce the number of iterations to optimality since a number of iterations are skipped. lp_solve starts iterating from this basis until optimality. Example
See Also make_lp, copy_lp, copy_lp, read_lp, read_LP, read_mps, read_freemps, read_MPS, read_freeMPS, read_XLI, get_basiscrash, default_basis, read_basis, write_basis, guess_basis, get_basis, set_basis |