lpSolveAPI (version 5.5.0.12-3)

solve.lpExtPtr: Solve a Linear Program

Description

Attempt to compute the optimal solution of an lpSolve linear program model object.

Usage

## S3 method for class 'lpExtPtr':
solve(a, b, ...)

Arguments

a

an lpSolve linear program model object.

b

this argument is ignored.

...

additional arguments are ignored.

Value

• a single integer value containing the status code.

Status Codes

rl{ 0: "optimal solution found" 1: "the model is sub-optimal" 2: "the model is infeasible" 3: "the model is unbounded" 4: "the model is degenerate" 5: "numerical failure encountered" 6: "process aborted" 7: "timeout" 9: "the model was solved by presolve" 10: "the branch and bound routine failed" 11: "the branch and bound was stopped because of a break-at-first or break-at-value" 12: "a feasible branch and bound solution was found" 13: "no feasible branch and bound solution was found" }

References

http://lpsolve.sourceforge.net/5.5/index.htm

Examples

lps.model <- make.lp(0, 3)
xt <- c(6,2,4)
add.constraint(lps.model, xt, "<=", 150)
xt <- c(1,1,6)
add.constraint(lps.model, xt, ">=", 0)
xt <- c(4,5,4)
add.constraint(lps.model, xt, "=", 40)
set.objfn(lps.model, c(-3,-4,-3))

solve(lps.model)