vensim2 basic tools text

7/25/2019 Vensim2 Basic Tools Text

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youstartusingthesoftwareforcreatingcausalloop

diagramsandatthesametimeexploremoreofitsfeatures.


2/11

liketheoneonthisslide.Thetitlebarcontainsthenameof

themodelandthesocalledbenchmarkvariable.Thisisthe

variableselected

at

aparticular

time.

Since

no

model

is

selectedthetitlebarshowsVensim:NoModelOpen(forthe

nameofthemodel)Var:FINALTIME(avariableforfinitetime

ofsimulationwhichisalwayspresent).Themenuandthemain

toolbarareimmediatelybelowthetitlebar.Thetypicalicons

onthemaintoolbarareduplicatesofthewellknown

, ,

Save,Print,

Cut,

Copy,

Paste).

The

tools

in

the

middle

of

this

toolbarareusedforsimulationandthoseontheleftsidefor

analysisoftheresults.Thestatusbaratthebottomofthe

windowisusedforchan in fonts colours insertin certain

labels,etc.


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askedtodefinethesettings.Themostimportantsettings

whichthesoftwareneedsinordertorunthesimulationare

thesettings

of

time.

This

settings

will

be

explained

later.

However,ifyouarenotdefiningyourownsettingsyouwill

havetoacceptthedefaultinordertoproceedwith

modelling.ClickOKtoacceptthesettings.


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Once ouacce tthesettin s ouwillobtainthesketchtoolbarbeneaththemaintoolbar.Themaintoolsyouwillusetocreateyourmodelsareonthesketchtoolbar.Atthispointthefirst6willbeexplained.1.Locksketch(whenselected,nochangescanbemadeinthemodel).

Clickon

it

ifyou

want

to

lock

the

model.

2.Move/SizeWordsandArrows(offerspossibilitytoresizeorchangepar so em o e . ew ca s oo e an oo . c on , enselectanyelementofthemodelanddragitifyouwanttomoveit.Toresizeabox,clickanddragonthesmallcircleintherightbottomcorner.Notethatboxeswithvariables/constantsarewithoutlinesanditisnotobviousthatthesmallcircleisassociatedwiththevariable/constant.Neitherthesizeoftheletters northenameofthevariable constantchangeswiththistool.Youcanuseittochangetheshapeoftherate

(flow).If

you

click

on

the

valve

and

drag

you

can

change

the

shape

in

the

wayyouwant.Thesizeandtheshapesofthearrowscanbechangedifyouclickonthesmallcircleinthemiddleofthelinewiththearrow.Ifyouclickonthearrowexactly,youcanchangethedirectionoftheline.

Continuesonnextpage.


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3. VariableAuxiliary/constant(createsvariablesorconstants).Clickonittocreateaconstantoravariable(auxiliaryinVensim terminology).Then,clickontheworkingareaandyouwillgetaboxwhereyouwritethename.Whenyouarefinished,clickEntertoacceptthevariableorEscotherwise.Youcanchangethenameofthevariableby

clicking

on

it.

The

box

will

be

opened

and

the

name

edited.

4. Stockvariable(createsstocksorlevels).Clickonittocreatestocksan wor nt esamewayas orvar a es. ores zeormovet evariablesandthestocksusethehandtool(describedunder2).

5. Arrowtoolcreatesarrows.Clickonthevariablewhichisatthebottomofthearrowanddragtothevariablethatisatthearrow.Clickonceontheway andthenonceagainonthevariablethatisattheendofthearrowtoobtainacurvedarrow.Ifyoudontclickon

, .arrowbyselectingthehandtool.Pullthearrowatthesmallcirclein

the

middle.

If

you

want

to

change

the

colour,

the

thickness

or

someotherpropertyofthearrowrightclickonthesmallcircleinthemiddleofthearroworatthetopofthearrow. Anewwindowappearwhereyoucanchosevariousoptions.


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adddelay,changethethicknessandthestyleoftheline,

choosepolarityorothersignsandpositiontheminvarious

ways.


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6. Flowvariablecreatesflows.Clickonitfirst.Foraninflowclickontheworkingareaanddragtothestockvariable.Clickonthestockvariable.Youwillgetaboxwhereyouwritethenameoftheflow.WritethenameandpressEnter.

Ifthe

flow

is

without

aname

press

Esc.

For

an

outflow

you

startfromthestockvariableanddrageitherintoanotherstockvariableandclickthere.Ifyouclickontheworkingsurfaceyouwillgetthesink(presentedassmallcloud).Tocreateoutflowandinflowwithasinglelinewithtwoarrows,createasinglearrowfirst.Then,selectthehandtoolandrightclickonthesmallcircleoftheflowwhichisclosetotheplacewhereyouwantanewarrow.Awindowwillappear

whereyou

can

select

Arrowhead

and

get

the

arrow.

If

you

wantyourflowto goaround,oneachturnholdtheShiftkeyandclick.Thencontinuetodrag.ClickwithoutholdingtheShiftkeywhenyouwanttoendwiththeflow.


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windowshownontheslideappears.Thecommentiswritten

inthefieldCommentanditisshapedbychosingthe

shape,text

position,

font

and

colours.

Images

can

be

also

inserted.Therearealimitednumberifimagesthatarebuilt

in,butotherimagescanalsobeimported.

Youcanusedocumentingtooltoinsertatitleforyourmodel

oranyothercomment.Ifyouhavenotplannedspaceforit,

itisalwayspossibletoselectthedrawingandmoveitdown

.


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wishtochangeitseveralbuttonsareavailabletoselectthe

font,thesizeandappearenceoftheletters,thecolourofthe

letters,the

surrounding

shape,

the

text

position,

the

colour

ofthearrow,itswidthandpolarity.Thelastbuttonisfor

pushingthehighlitedwordsinthebackground.


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convenienttosplititinseveralparts.Thiscanbedoneby

usingseveralviewsforthesketch.TheViewbuttononthe

statusbar

helps

create

new

views

which

are

labelled

as

View

2,View3etc.Oncetheyarecreatedyoucanscrollthrough

differentviesbyclickingontheleftortherightarrow

positionedatbothendsoftheviewbutton.

Forexample,withsimplemodelsyoucangiveexplanation

aboutthemodelinView1,havethesketchinView2and

.

vensim2 basic tools text

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