lpSolveAPI (version 5.5.2.0-17.12)

get.mat: Get Matrix Element

Description

Retrieve a single element from the matrix of constraints.

Usage

get.mat(lprec, i, j)

Value

a single numeric value.

Arguments

lprec

an lpSolve linear program model object.

i

a single numeric value from the set {1, ..., m} (where m is the number of constraints in lprec) specifying the row of the matrix element.

j

a single numeric value from the set {1, ..., n} (where n is the number of decision variables in lprec) specifying the column of the matrix element.

Author

Kjell Konis

References

https://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))

get.mat(lps.model, 2, 2)