[Help-glpk] Loading model files

[Manish Jain]

Hi all,

I have my source code written in AMPL for Cplex, and I am currently porting it GLPK.

The models don't work as is, since the original source code has some AMPL/CPlex specific commands.

Besides, I am more comfortable writing scripts in C++ than with scripting in AMPL; however, I find that writing models in AMPL is easier.

I have been able to convert most of my models to GLPK my adding rows, columns and generating the model row by row, column by column.

I also saw in the manual that there is a function to load models and data files, however, I want to generate data on the fly i.e. I just want to load a model, and then

generate data segments in the code. The requirement is such because I have a custom Branch and Price routine, and have two independent models for the 'master'

and the 'slave'. 

Example model:

param n;

set N := {1..n};

.

.

.

var x {N} >= 0;

.

.

.

maximize objective: ...  

subject to: 

.

.

.

What is the preferred way to do this, since I wasn't able to set the values of the parameters from the C++ code :| 

Manish Jain
University of Southern California