Symphony

• Symphony Gateway Functions
• symphony — Solves a mixed integer linear programming constrained optimization problem.
• symphony_mat — Solves a mixed integer linear programming constrained optimization problem.
• sym_addConstr — Add a new constraint
• sym_addVar — Add a new variable
• sym_close — Close the Symphony environment
• sym_deleteConstrs — This routine is used to delete rows from the original constraint matrix.
• sym_deleteVars — This routine is used to delete columns from the original problem description.
• sym_getConstrActivity — Get the activity of the constraints in the solution
• sym_getConstrLower — To get the lower bounds of the constraints.
• sym_getConstrRange — To to get the constraint ranges.
• sym_getConstrSense — To get the row senses.
• sym_getConstrUpper — To get the upper bounds of the constraints.
• sym_getDblParam — This routine is used to get the value of a double type parameter.
• sym_getInfinity — Get Symphony's infinity value
• sym_getIntParam — This routine is used to get the value of an integer type parameter.
• sym_getIterCount — To get the number of the analyzed nodes of the branching tree after solving the problem.
• sym_getMatrix — To get the constraint matrix.
• sym_getNumConstr — To get the number of the constraints of the current problem.
• sym_getNumElements — To get the number of non-zero entries of the constraint matrix of the current problem.
• sym_getNumVar — To get the number of the variables of the current problem.
• sym_getObjCoeff — To get the objective vector.
• sym_getObjSense — Get the objective sense
• sym_getObjVal — Get the optimized objective value
• sym_getPrimalBound — Get the primal bound of the problem
• sym_getRhs — To to get the right hand side vector(column vector).
• sym_getStatus — To get status of the problem solver.
• sym_getStrParam — This routine is used to get the value of a string type parameter.
• sym_getVarLower — To get the lower bounds of the variables.
• sym_getVarSoln — Get the solution for the problem
• sym_getVarUpper — To get the upper bounds of the variables.
• sym_isAbandoned — To check whether the problem was abandoned for some reason.
• sym_isBinary — Check if a variable is constrained to be binary
• sym_isContinuous — Check if a variable is continuous
• sym_isEnvActive — Check if Symphony environment is active
• sym_isInfeasible — To check whether the problem was proven to be infeasible.
• sym_isInteger — Check if a variable is constrained to be an integer
• sym_isIterLimitReached — To know whether the iteration limit (node limit) was reached.
• sym_isOptimal — To check whether the problem was solved to optimality.
• sym_isTargetGapAchieved — To know whether the target gap was reached.
• sym_isTimeLimitReached — To know whether the time limit was reached.
• sym_loadMPS — This routine is used to load an instance from an MPS file.
• sym_loadProblem — Load a problem into Symphony
• sym_loadProblemBasic — Load a problem into Symphony (basic version)
• sym_open — Open the Symphony environment
• sym_resetParams — This routine sets all the environment variables and parameters to their default values.
• sym_setConstrLower — Set the lower bound of a constraint
• sym_setConstrType — Set the type of a constraint
• sym_setConstrUpper — Set the upper bound of a constraint
• sym_setContinuous — This routine is used to set the type of a variable to be continuous.
• sym_setDblParam — This routine is used to set a double type parameter.
• sym_setIntParam — This routine is used to set an integer type parameter.
• sym_setInteger — This routine is used to set the type of a variable to be integer.
• sym_setObjCoeff — Set coefficient of a variable in the objective
• sym_setObjSense — Set the objective sense
• sym_setPrimalBound — Set the primal bound of the problem
• sym_setStrParam — This routine is used to set a string type parameter.
• sym_setVarLower — Set lower bound of a variable
• sym_setVarSoln — Set a solution for the problem
• sym_setVarUpper — Set upper bound of a variable
• sym_solve — To solve the currently loaded MILP problem from scratch.