Package 'ROI.models.miplib'

Title: 'ROI' Access to 'MIPLIB' 2010 Benchmark Instances
Description: The mixed integer programming library 'MIPLIB' (see <http://miplib.zib.de/>) is commonly used to compare the performance of mixed integer optimization solvers. This package provides functions to access 'MIPLIB' from the 'R' Optimization Infrastructure ('ROI'). More information about 'MIPLIB' can be found in the paper by Koch et al. available at <http://mpc.zib.de/index.php/MPC/article/viewFile/56/28>. The 'README.md' file illustrates how to use this package.
Authors: Florian Schwendinger [aut, cre], Stefan Theussl [aut]
Maintainer: Florian Schwendinger <[email protected]>
License: GPL-3
Version: 1.0-0
Built: 2024-09-10 03:53:55 UTC
Source: https://github.com/r-forge/roi

Help Index

Access the Downloaded MIPLIB

Description

Get one or more optimization problems, meta information or a listing of the available MIPLIB 2010 problems.

Usage

miplib(x, folder = system.file("roi_op", package = "ROI.models.miplib"))

Arguments

x

a character giving the names of the optimization problems to be returned, if x is "all" all available problems are returned, if x is the name of a single problem the given problem is returned. If x is missing a listing of all available problems is returned. If x is "metainfo" the meta information about the problems is returned.
folder

the folder where the optimization problems are stored.

Details

The function miplib searches in the given folder for .rds files and returns them.

Examples

## Not run: 
## list all available MIPLIB-2010 problems
miplib()
## get all miplib problems
miplib("all")
## get a single problem
miplib("rmine6")
## get the meta information
miplib("metainfo")

## End(Not run)

Download the 'MIPLIB 2010' Test Problem Set

Description

The MIPLIB 2010 test problem set is downloaded and transformed from the MPS format into the ROI format. The results are stored as '.rds' files at the location provided via the parameter folder.

miplib_download_metinfo()

Usage

miplib_download_all(
    url = "http://miplib2010.zib.de/download/miplib2010-1.1.3-complete.tgz",
    folder = system.file("roi_op", package = "ROI.models.miplib"),
    method = NULL, quiet = TRUE, force = FALSE, cleanup = TRUE)


  miplib_download_benchmark(
    url = "http://miplib2010.zib.de/download/miplib2010-1.1.3-benchmark.tgz",
    folder = system.file("roi_op", package = "ROI.models.miplib"),
    method = NULL, quiet = TRUE, force = FALSE, cleanup = TRUE)


  miplib_download_metainfo(
    url = "http://miplib2010.zib.de/download/miplib2010_all.solu",
    folder = system.file("roi_op", package = "ROI.models.miplib"),
    force = FALSE)

Arguments

url

a character giving the url to MIPLIB 2010.
folder

an optional character giving the location where the MIPLIB 2010 test problem set should be downloaded to.
method

a character giving the method to be used for downloading files, for more information see download.file.
quiet

a logical giving if status status messages should be suppressed.
force

a logical if TRUE (default is FALSE) the download is forced, regardless if the metainfo was downloaded previously.
cleanup

a logical if TRUE (default is TRUE) the downloaded temporary files are deleted after the download an conversion is completed.

Details

  • miplib_download_all download all MIPLIB-2010 instances (arround 1.3 GB).

  • miplib_download_benchmark download the MIPLIB-2010 benchmark instances (arround 94 MB).

  • miplib_download_metinfo download the available meta information.

Examples

## Not run: 

## download all MIPLIB-2010 instances (arround 1.3 GB)
miplib_download_all()
## or
miplib_download_all(folder = "data/miplib")

## download MIPLIB-2010 benchmark instances (arround 94 MB)
miplib_download_benchmark()
## or 
miplib_download_benchmark(folder = "data/miplib")

## download meta information
miplib_download_metinfo()

## End(Not run)