R: Get Constraint Type

get.constr.type {lpSolveAPI} | R Documentation

## Get Constraint Type

### Description

Retrieve constraint types from an lpSolve linear program model object.

### Usage

    get.constr.type(lprec, constraints = 1:m, as.char = TRUE)

### Arguments

`lprec` | an lpSolve linear program model object.
`constraints` | a numeric vector of unique values from the set `{1, ..., m}` (where `m` is the number of constraints in `lprec`) specifying the constraints for which the types will be retrieved.
`as.char` | a logical value. If `TRUE` the constraint type is returned as a character string, otherwise the integer code used internally by lpSolve is returned.

### Value

either a character vector or an integer vector containing the types of the constraints specified in `constraints`. The possibilities are: `0 = "free"`, `1 = "<="`, `2 = ">="` and `3 = "="`.

### 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, "<=", 15)

    xt <- c(1,1,6)
    add.constraint(lps.model, xt, ">=", 15)

    xt <- c(4,5,4)
    add.constraint(lps.model, xt, "=", 40)

    get.constr.type(lps.model)

[Package lpSolveAPI version 5.5.2.0-17 Index]