R: Set Row

set.row {lpSolveAPI} | R Documentation

## Set Row

### Description

Set a column in an lpSolve linear program model object.

### Usage

    set.row(lprec, row, xt, indices)

### Arguments

`lprec` | an lpSolve linear program model object.
`row` | a single numeric value from the set `{1, ..., m}` (where `m` is the number of constraints in `lprec`) specifying which column to set.
`xt` | a numeric vector containing the constraint coefficients (only the nonzero coefficients if `indices` is also given). The length of `xt` must be equal to the number of decision variables in `lprec` unless `indices` is provided.
`indices` | optional for sparse `xt`. A numeric vector the same length as `xt` of unique values from the set {1, ..., n} where n is the number of decision variables in `lprec`; `xt[i]` is set in column `indices[i]` in the specified row. The coefficients for the columns not in `indices` are set to zero. This argument should be omitted when `length(xt) == n`.

### Value

a `NULL` value is invisibly returned.

### Author(s)

Kjell Konis kjell.konis@me.com

### References

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

### Examples

    lps.model <- make.lp(2, 4)
    set.row(lps.model, 2, c(6,2,4,9))
    set.row(lps.model, 1, c(3,1,5), indices = c(1,2,4))

[Package lpSolveAPI version 5.5.2.0-17 Index]