lpSolveAPI (version 5.5.0.12-3)

set.mat: Set Matrix Element

Description

Set the value of a single matrix element in an lpSolve linear program model object.

Usage

set.mat(lprec, i, j, 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.

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.

value

a single numeric value.

Value

• a logical value indicating whether setting the matrix element was successful is invisibly returned.

References

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

See Also

resize.lp

Examples

lps.model <- make.lp(4, 2)
x <- c(6,2,4,9)
set.column(lps.model, 2, x)
y <- c(3,1,5)
ind <- c(1,2,4)
set.column(lps.model, 1, y, ind)
set.constr.type(lps.model, rep("<=", 4))

set.mat(lps.model, 3, 2, 4.5)