Optimize_Second_Objective: Load and Optimize the second Objective Function

Description Usage Arguments Details Value See Also Examples

View source: R/Optimizer.R

Description

Optimize_Second_Objective loads the optimization problem and optimizes Second_Objective in Julia environment.

Usage

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Optimize_Second_Objective(Time_limit=1e7, Solver="SCIP",
                                 Silence= FALSE, Env= .GlobalEnv)

Arguments

Time_limit

A double: the total time limit in seconds

Solver

A string: defining the solver to be used to solve the problem. (Default: "SCIP")

Silence

A binary parameter: if FALSE, the function will report a summary message. If TRUE, the function will be silent. (Default: FALSE)

Env

the environment where the package should create or access variables. By default the package works in the R's Global environment. (Default: .GlobalEnv)

Details

In the list that Optimize_Second_Objective returns, [["Status"]] defines the status of the returned solution.
If [["Status"]]="OPTIMAL", the problem was solved to optimality and the parcels' optimal status are stored in [["Result"]]. Also, the optimal value will be stored in [["Objective_Value"]].
If [["Status"]]="TIME_LIMIT", the solver was terminated because the time limit was reached. If any feasible solution was reported by the solver, it would be stored in [["Result"]]. Otherwise, [["Result"]] and [["Objective_Value"]] would be both equal to "N/A".
If [["Status"]]="INFEASIBLE", the problem is infeasible. So, no solution would be reported.

In any other case, the [["Status"]] will be the solution status that the solver has reported.

Value

A list with 5 members:
[["Solution_time"]]: a numeric value; defining the time spent in the solver in seconds.
[["Status"]]: a character; defining the status of the solution.
[["Gap"]]: a numeric value; defining the relative optimality gap of the solution.
[["Result"]]: a vector of binaries; its i'th element defines if the parcel named Parcels[i] is protected or not.Comparing these values with the values of Status defined when creating the problem, the user can find which parcels are to be invested, divested, or remain the same.
[["Objective_Value"]]: a numveric value; the returned value of Second objective.

See Also

Other Optimizer Functions: Load_Problem(), Optimize_First_Objective(), Optimize_NBP(), Optimize_WSO()

Other Second Objective: Second_Objective_Create(), Second_Objective_Import()

Examples

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## Not run: 

Optimization_Result = Optimize_Second_Objective(Time_limit=1e7, Solver="SCIP")

## End(Not run)

paymanghasemi/SiteOpt documentation built on April 8, 2021, 3:44 a.m.