Rglpk_read_file {Rglpk}R Documentation

Interface to GLPK's file reader

Description

High level R interface to the MPS and CPLEX_LP reader of the GNU Linear Programming Kit (GLPK).

Usage

## MPS file reader
Rglpk_read_file(file, type = c("MPS_fixed", "MPS_free", "CPLEX_LP"),
ignore_first_row = FALSE, verbose = FALSE) 

## print method
## S3 method for class 'MP_data_from_file':
print(x, ...)

Arguments

file a character specifying the relative or absolute path to the model file.
type a character specifying the file format. This can be either "MPS_fixed", "MPS_free" and "CPLEX_LP".
ignore_first_row a logical indicating whether the first row of the model file should be ignored or not. Default: FALSE.
verbose a logical for turning on/off additional solver output. Default: FALSE.
x an object of class "MP_data_from_file".
... further arguments passed on to the print method.

Details

Rglpk_read_file() takes the path to a file as an argument and calls GLPK's file reader. The description of the linear or mixed integer linear program is returned as an object of class "MP_data_from_file".

Value

Rglpk_read_file() returns the specification of a mixed integer linear program defined in file as an object of class "MP_data_from_file".

Author(s)

Stefan Theussl

Examples

## not run:
## x <- Rglpk_read_file(some_file.MPS)
## x
## Rglpk_solve_LP(x$objective, x$constraints[[1]], x$constraints[[2]],
##                x$constraints[[3]], x$types, x$maximum, x$bounds)
[Package Rglpk version 0.2-9 Index]