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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 2015 Lindo
Systems Inc.
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