Gams code in LaTeX documents

Edson Valle recently wrote a style for the package listings from LaTeX. It allows you to format Gams code nicely in your LaTeX documents.
Here is a small example taken from his post to the Gams mailing list:
Scalar X /1/;
Scalar Y;
Y = 2*X;
Display “This is the famous Y”, Y;
In your LaTeX document this would look like:
The only thing you have to do is write a file gams.tex with the style and include this file in your LaTeX document before \begin{document}.
Information on the package Listings can be found here: listings
The gams.tex file should look like this:
\usepackage{listings}
%author Edson Cordeiro do Valle edsoncv at gmail dot com

\lstdefinelanguage{GAMS}{
morekeywords={
ABORT , ACRONYM , ACRONYMS , ALIAS , ALL , AND , ASSIGN , BINARY , CARD , DISPLAY , EPS , EQ , EQUATION , EQUATIONS , GE , GT , INF , INTEGER , LE , LOOP , LT , MAXIMIZING , MINIMIZING , MODEL , MODELS , NA , NE , NEGATIVE , NOT , OPTION , OPTIONS , OR , ORD , PARAMETER , PARAMETERS , POSITIVE , PROD , SCALAR , SCALARS , SET , SETS , SMAX , SMIN , SOS1 , SOS2 , SUM , SYSTEM , TABLE , USING , VARIABLE , VARIABLES , XOR , YES , REPEAT , UNTIL , WHILE , IF , THEN , ELSE , SEMICONT , SEMIINT , FILE , FILES , PUT , PUTPAGE , PUTTL , PUTCLOSE , FREE , NO , SOLVE , FOR , ELSEIF , ABS , ARCTAN , CEIL , COS , ERROR , EXP , FLOOR , LOG , LOG10 , MAP , MAPVAL , MAX , MIN , MOD , NORMAL , POWER , ROUND , SIGN , SIN , SQR , SQRT , TRUNC , UNIFORM , LO , UP , FX , SCALE , PRIOR , PC , PS , PW , TM , BM , CASE , DATE , IFILE , OFILE , PAGE , RDATE , RFILE , RTIME , SFILE , TIME , TITLE , TS , TL , TE , TF , LJ , NJ , SJ , TJ , LW , NW , SW , TW , ND , NR , NZ , CC , HDCC , TLCC , LL , HDLL , TLLL , LP , WS , /,PROD: },
sensitive = false,
morecomment=[f]*,%
morecomment=[s]{$ontext}{$offtext},
morecomment=[s][\color{green}]{/}{/},
morestring=[b]”,
morestring=[b]’
}
\lstset{
basicstyle=\fontfamily{pcr}\fontseries{m}\selectfont\footnotesize,
commentstyle=\color{gray}\itshape,
keywordstyle=\color{blue}\bfseries,
stringstyle=\color[rgb]{0.5,0,0.5}\itshape,
showstringspaces=false,
numbers=left,
numberstyle=\color[rgb]{0,0.5,0.5}\fontfamily{pcr}\fontseries{m}\selectfont\tiny,
numberblanklines=false,
showlines=false,
belowskip=\bigskipamount{},
breaklines=true,
%stepnumber=2,
tabsize=6,
%extendedchars=true,
%float=h,
frame=tb
}

6 Replies to “Gams code in LaTeX documents”

  1. Sam Madhani

    This seems much more comfortable than converting the code to pdf from emacs (the way I insert gams code in latex currently). Since I prefer to use Lyx, I tried to define \input in the preamble, but texlive threw an error. Is it possible to use this method (comfortably) in Lyx instead of defining it in the .tex manually?

  2. Juan

    gams.tex(1): Error: ! LaTeX Error: \usepackage before \documentclass.
    gams.tex(4): Error: ! Undefined control sequence.
    gams.tex(4): Error: ! LaTeX Error: Missing \begin{document}.
    gams.tex(9): Error: ! Extra }, or forgotten $.
    gams.tex(9): Error: ! Missing } inserted.
    gams.tex(10): Error: ! Undefined control sequence.
    gams.tex(14): Error: ! Undefined control sequence.
    gams.tex(15): Error: ! Undefined control sequence.
    gams.tex(16): Error: ! Undefined control sequence.
    gams.tex(17): Error: ! Undefined control sequence.
    gams.tex(18): Error: ! Undefined control sequence.
    gams.tex(21): Error: ! Undefined control sequence.
    gams.tex(21): Error: ! Undefined control sequence.
    gams.tex(24): Error: ! Missing number, treated as zero.
    gams.tex(24): Error: ! Illegal unit of measure (pt inserted).
    gams.tex(2): Error: ! Undefined control sequence.
    gams.tex(3): Error: ! LaTeX Error: The font size command \normalsize is not defined:
    gams.tex(5): Error: ! LaTeX Error: The font size command \normalsize is not defined:

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