set.column {lpSolveAPI}R Documentation

Set Column

Description

Set a column in an lpSolve linear program model object.

Usage

set.column(lprec, column, x, indices = 1:m)

Arguments

lprec an lpSolve linear program model object.
column a single numeric value from the set {1, ..., n} specifying which column to set.
x a numeric vector containing the elements (only the nonzero elements if indices is also given) to be used in the added column. The length of x must be equal to the number of constraints in lprec unless indices is provided.
indices a numeric vector the same length as x of unique values from the set {0, ..., m} where m is the number of constraints in lprec; x[i] is entered into constraint indices[i] in the column. The coefficients for the constraints not in indices are set to zero. In particular, index 0 is the objective function coefficient in the column and is set to zero by default.

Value

a logical value indicating whether the column was successfully set is invisibly returned.

Author(s)

Kjell Konis kjell.konis@epfl.ch

References

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

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)

[Package lpSolveAPI version 5.5.0.14 Index]