使用lingo求解数学程序2指南教程chapter2.pdf

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SolvingMathProgramswith

LINGO

2.1Introduction

Theprocessofsolvingamathprogramrequiresalargenumberofcalculationsandis,therefore,best

performedbyacomputerprogram.ThecomputerprogramwewilluseiscalledLINGO.Themain

purposeofLINGOistoallowausertoquicklyinputamodelformulation,solveit,assessthe

correctnessorappropriatenessoftheformulationbasedonthesolution,quicklymakeminor

modificationstotheformulation,andrepeattheprocess.LINGOfeaturesawiderangeofcommands,

anyofwhiaybeinvokedatanytime.LINGOcheckswhetheraparticularcommandmakessense

inaparticularcontext.

LINGOisavailableintwoversions:

1)aWindows-specificversion,and

2)ageneric,text-basedversion.

Thetext-basedversionrunsundermostpopularoperatingsystems,ludingUnixandLinux.For

eitherversion,additionalinformationisavailabletotheuserundertheHelpitemorHelp

command.TheWindowscommandsarecoveredbrieflyhere.Afterthecommandssection,wewill

showyouhowtoenndsolveasimplemodel.

2.2LINGOforWindows

WhenLINGOforWindowsstarts,itopensablankwindowknownasaModelWindow.TheModel

Windowiswhereyou“doallyourwork”.OutputinLINGOisdisyedinaReportWindow.LINGO

cangenerateanumberofreportspertainingtoyourmodel.Thefollowingisalistofallthecommands

thatareavailabletoyou,mainlyinthemodelwindow.

2.2.1File

NEWF2

UsetheNEWcommandfromtheFile,pressF2,orusethebuttontocreateanewModel

window.IntheModelwindow,youcanenteryourmodel.