TABLE OF CONTENTS LINGO is a computer-aided optimization software that solves linear, non-linear, and mixed integer linear and non-linear programs. It is developed by LINDO Systems Inc. and may be ordered from http://www.lindo.com. A trial version for assessing the software may be downloaded from the LINDO Systems web site. The following is a brief description of how to get started on using LINGO. Additional information can be obtained through the Help menu on the LINGO software or from Schrage (1999).
From the File menu, use the New command. An empty untitled window will be displayed. On this window, you can type the model.
The following are some basic information on writing a LINGO optimization model. The general form of the model is composed of an objective function and a number of constraints. The objective function is either to be minimized or maximized. These two options are expressed as follows:
Min = Objective function;
or
Max = Objective function;
Next, we write the set of constraints. Each constraint is followed by a semicolon ; .
Finally, the program is finished by typing End.
Comment lines may be added to the program as follows:
! Comment line;
All the statements between the exclamation mark ! and the semicolon ; will be ignored by LINGO during computations.
If the line for minimizing or maximizing an objective function is not included, LINGO will solve the model as a set of equations provided that the degrees of freedom are appropriate. In...
