简单eviews命令(2)

全英文

3Writingtheprogram

openanexistingwork le:openc:\mypath\mywork

or

creatinganewwork lenamedmywork:workfilemyworku110000 Allvariablesusedhavetobedeclared rst Don’tforgettosaveitfromtimetotime!

Usecommentsextensivelytounderstandyourprogramlateron,commentlinesbeginwitha’,forexample:

’thisprogramcomputesVaRonsimulateddata

4Programvariables

(seealsounderhelp→EViewssearch)

Control(program)variables:namesbeginwitha!!anfang=1

!ende=!anfang+100 Generalvariablescoefaseriesxvector(10)vmatrix(10,3)mgroupg

Stringvariables(textenclosedindoublequotes):namesbeginwitha%

%str="Thisisastring"

youcanusestringstohelpyoubuildupcommandsandvariablenamesorasheadingsintables

Manipulatingstringvariables

–convertingastringvariablecontaininganumberintoanumberbyusingthe@valfunction%str=".05"

!nmbr=@val(%strng)

–convertinganumberintoastringvariable%strng=@str(!nmbr)–concatenatingstrings

%sampleperiod=""+@str(!anfang)+""+@str(!ende) Replacementvariables:EViewsallowsyoutoconstructcommandlinesusingthecontentsofstringandcontrolvariables.!i=1

seriesx!i%strng="new"seriesx%strng}

declaresaseriesnamedx1declaresaseriesnamedx