R: Get Matrix Element

get.mat {lpSolveAPI} | R Documentation

## Get Matrix Element

### Description

Retrieve a single element from the matrix of constraints.

### Usage

    get.mat(lprec, i, j)

### 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.

### Value

a single numeric value.

### Author(s)

Kjell Konis kjell.konis@me.com

### References

http://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)

[Package lpSolveAPI version 5.5.2.0-17 Index]