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Easy Model Expression One
of LINGO's most powerful features is its mathematical modeling
language. LINGO's modeling language lets you express your problems in a
natural manner very similar to standard mathematical notation. LINGO
allows you to do things such as quickly express a series of similar
constraints in a single compact statement. Your models are compact and
easy to read.
When building models, you typically
find there are one or more sets of related objects (e.g., sets of
factories, customers, vehicles, or employees). Often if a constraint
applies to one member of a set, then a constraint of the same form also
applies to each of the other set members. Rather than requiring that
you express an individual constraint for each set member, LINGO allows
you to express the entire group of constraints in one concise
statement. Taking advantage of sets is the foundation of LINGO's
modeling language, the fundamental building block of the program's most
powerful capabilities. LINGO even allows you to express common sets
implicitly, such as days of the week or months of the year.
LINGO's
modeling language can help you drastically cut your model development
time. Very large models can often be efficiently expressed with LINGO
in less than a single page. The modeling language's similarity to
standard mathematical notation makes it very easy to read. Models are
easier for the developer to maintain and for colleagues to read and
understand.
Using LINGO, you can easily make your
model "scalable". This means the dimensions of your model can change
without requiring changes to your expression of the problem. For
example, suppose you are finding the cheapest way to supply a product
from several different warehouses to several different customers. If
the number of warehouses or customers change, many modeling packages
would require significant changes to the problem's formulation.
However, with LINGO, your problem formulation needs no modification.
You can simply change the size of your data files and LINGO takes care
of the rest.
LINGO's modeling language includes an extensive library of
mathematical, probability and financial functions. For more
information, see the List of Built-in Functions.
You can also create user defined functions for LINGO to use. LINGO
accepts generalized expressions including those with parentheses and
variables on the right-hand side. LINGO allows you to have meaningful
variable names up to 32 characters.© Copyright 2011 Lindo Systems Inc.
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