Get Column

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Description

Retrieve a column from an lpSolve linear program model object.

Usage

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get.column(lprec, column)

Arguments

lprec

an lpSolve linear program model object.

column

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

Value

a list with elements column and nzrow such that column[i] contains the constraint coefficient in row nzrow[i]. Rows not present in nzrow have coefficient zero in column.

Author(s)

Kjell Konis kjell.konis@me.com

References

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

Examples

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lps.model <- make.lp(4, 0)

x <- c(6,2,4,9)
add.column(lps.model, x)

y <- c(3,1,5)
ind <- c(1,2,4)
add.column(lps.model, y, ind)

get.column(lps.model, 2)

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