GLPK/R
R is a free software environment for statistical computing and graphics. The R project is responsible for R. Packages for R are provided by the Comprehensive R Archive Network (CRAN). R is cross-platform and supported on Windows, MacOS X, and Linux.
In addition, R scripts (as can gnuplot scripts) can be use to process GLPK output directly, without the use of dedicated R packages.
Rglpk
[edit | edit source]Package Rglpk is provided by CRAN — which also contains the reference manual.
To install from repository within R:
install.packages("Rglpk")
To install from local archive within R:
install.packages("Rglpk_0.6-3.tar.gz", repos = NULL, type="source")
Debian-based Linux users can also install Rglpk via the Debian package r-cran-rglpk. But it would pay to check on currency.
Rglpk provides two functions:
- Rglpk_read_file reads a linear problem from a file in either of the following formats: fixed MPS, free MPS, CPLEX, and GMPL.
- Rglpk_solve_LP solves a linear and mixed linear problems.
The following commands solve a problem provided in GMPL file /home/user/test.mod
library(Rglpk) x <- Rglpk_read_file( "/home/user/test.mod", type = "MathProg", verbose = TRUE) Rglpk_solve_LP(x$objective, x$constraints[[1]], x$constraints[[2]], x$constraints[[3]], x$bounds, x$types, x$maximum)
glpkAPI
[edit | edit source]The package glpkAPI has not been maintained since 2015.
glpk
[edit | edit source]The deprecated package glpk has been archived by CRAN. It was based on GLPK 4.8 and never updated since 2006.