R: Get Column

get.column {lpSolveAPI} | R Documentation

## Get Column

### Description

Retrieve a column from an lpSolve linear program model object.

### Usage

    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

    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)

[Package lpSolveAPI version 5.5.2.0-17.7 Index]