GAMS – Data Exchange (GDX)

Tools and Utilitiesattilities

Paul van der Eijk pvandereijk@gams.com

GAMS Development Corp. www.gams.com

GAMS Software GmbH www.gams.de

Informs,

San Diego,

2009

GDX files

Data file for multiple GAMS symbols

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GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

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GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

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GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

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Platform independent

GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

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Platform independent

Contains domain information

GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

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Platform independent

Contains domain information

Can be compressed

GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

8

Platform independent

Contains domain information

Can be compressed

GDX Tools do not require a licenseies

GDX files

Data file for multiple GAMS symbols

No Symbolic Equations

Binary (no loss of precision)

9

Platform independent

Contains domain information

Can be compressed

GDX Tools do not require a license

Open API for multi language/platformes

Create a GDX file

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Viewing a GDX file

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Viewing a GDX file (GAMS IDE)

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Export GDX file (GAMS IDE)

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View file in Excel

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Export GDX file (GAMS IDE)

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View file in Excel (TOC)

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View file in Excel

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View GDX File GAMS IDE

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GDXDiff

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GDXDiff

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GDXMerge* Generate a few gdx files

$call rm *.gdx

$call gamslib trnsport

$call gams trnsport lp=bdmlp gdx=bdmlp

$call gams trnsport lp=cplex gdx=cplex

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$call gams trnsport lp=cplex gdx=cplex

$call gams trnsport lp=conopt gdx=conopt

$call gams trnsport lp=gurobi gdx=gurobi

$call gams trnsport lp=minos gdx=minos

$call gams trnsport lp=snopt gdx=snopt

$call gams trnsport lp=xa gdx=xa

$call gams trnsport lp=xpress gdx=xpress

$call gdxmerge *.gdx

$call shellexecute /verb=open merged.gdx

GDXMerge

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GDXXRW

Reading and writing Excel spreadsheets

Requires that MS Excel is installed

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GDXXRW

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GDXXRW

$call =gdxxrw.exe data1.xls cmerge=1 par=A rng=sheet1!A1

rdim=2 cdim=2

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GDXXRW

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GDXXRW

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GDXXRW

XLSTalk utility

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GDXXRW

XLSTalk utility

Test if Excel is installed

Open / Close Excel file

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Open / Close Excel file

Run an Excel Macro

GDX API

Support for multiple languages

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GDX API

Support for multiple languages

CC++

Delphi (Pascal)

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Delphi (Pascal)FortranJavaVisual Basic

GDX API

Support for multiple platforms

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GDX API

Support for multiple platforms

All platforms where GAMS is available

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GDX API Examples / Documentation

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Contacting GAMS

Europe

GAMS Software GmbH

Eupener Str. 135-137

50933 Cologne

USA

GAMS Development Corp. 1217 Potomac Street, NW

50933 CologneGermany

Phone: +49 221 949 9170

Fax: +49 221 949 9171

http://www.gams.de

info@gams.de

support@gams-software.com

1217 Potomac Street, NW

Washington, DC 20007USA

Phone: +1 202 342 0180

Fax: +1 202 342 0181

http://www.gams.com

sales@gams.com

support@gams.com

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