This page contains information on how to use the packages: **maple, lp_solve,
cplex **and** lrs**.

All are installed on lab machines located on the 1st floor of McConnell
Engineering:

eg: lab103n-i.cs.mcgill.ca where i is replaced by a small
integer.

See below for how to get an account. If you do not find the software,

try typing: %source /usr/socs/Cshrc

**cplex** (path: /usr/local/pkgs/cplex/ )

Instructions for cplex can be found here.

**maple** (path: /usr/local/pkgs/maple/bin/)

A maple session that shows how to solve systems of equations
is here.

This can be useful to check your arithmetic for Assignment
1

This program can be used to solve linear or integer linear programs.

Usage: lp_solve < input_file

A small lp_solve session is shown here.

Some examples input and output files are here.

The man page is here.

The full package is available for download from the lp_solve home page.

A nice help page with windows/DOS binary is available at:

http://www.statslab.cam.ac.uk/~rrw1/opt/lp_solve/

This program computes all of the extreme points (and extreme rays if any) of the

feasible region of an LP. Home page is: http://cgm.cs.mcgill.ca/~avis/C/lrs.html

How to get a computer account:The prerequisites are

1) Must be taking
a CS course

2) Must have paid
tuition

From any unix lab workstation (103N, 105N)

1) Log-in username
"newuser" password "newuser"

2) Follow the steps

- An account
will be created.

Alternative is
to use any webbrowser and connect to

"newuser.cs.mcgill.ca"

Machines are available in McConnell 103n, and have names

lab103n-k.cs.mcgill.ca where k=1,2,3,....

To connect from home you will need to use ssh (telnet will not
work)

High performance workstations available for this
course are in MC110, and

have names: lab110-5...lab110-18

The SOCS Inside-Out Website is a dynamic student initiative which aims
to

reduce frustration and raise the level of computing competency
at McGill.

It can be found on the web at http://www.cs.mcgill.ca/~guide.