Search found 11 matches

by swati
Thu Mar 09, 2017 5:04 pm
Forum: System Dynamics Discussion
Topic: Modeling goal seeking behaviour when desired goal is changing
Replies: 3
Views: 5331

Re: Modeling goal seeking behaviour when desired goal is changing

Hi JJ
Thanks a lot.I will keep this mind before posting in future.thanks

Regards
Swati
by swati
Mon Mar 06, 2017 1:46 pm
Forum: Vensim
Topic: calling time=x-1 data into an equation
Replies: 9
Views: 4960

Re: calling time=x-1 data into an equation

Thanks.this works perfectly for me. :)
by swati
Fri Mar 03, 2017 7:34 am
Forum: System Dynamics Discussion
Topic: Modeling goal seeking behaviour when desired goal is changing
Replies: 3
Views: 5331

Modeling goal seeking behaviour when desired goal is changing

Hi I have a model in which I have a variable called Actual Price.Following Sterman's price discovery by hill climbing structure ( described in CH13), I am modelling actual price in goal-seeking manner.Actual price adjusts to indicated price.Indicated price, in turn, increases or decreases depending ...
by swati
Fri Mar 03, 2017 6:37 am
Forum: Vensim
Topic: calling time=x-1 data into an equation
Replies: 9
Views: 4960

Re: calling time=x-1 data into an equation

Hi
I have a similar query.I want to calculate growth rates of my stock variables.How can i do this in vensim ple? For example, I have a stock variable called aggregate output (Y). I want to calculate growth rate of Y using the formula : [Y(t) -Y(t-1)]/Y(t).
How do I get lagged value Y(t-1)?

Swati
by swati
Thu Jan 19, 2017 11:48 am
Forum: System Dynamics Discussion
Topic: Suggestions needed for modelling wealth in a growth model in vensim
Replies: 3
Views: 3801

Re: Suggestions needed for modelling wealth in a growth model in vensim

One specific point that I think that I am doing wrong is that variable old age is not included anywhere when i am modeling total wealth as coflow.But i am not very clear how it can be included??
by swati
Thu Jan 19, 2017 11:22 am
Forum: System Dynamics Discussion
Topic: Suggestions needed for modelling wealth in a growth model in vensim
Replies: 3
Views: 3801

Suggestions needed for modelling wealth in a growth model in vensim

Dear users, I am modelling an economic growth model in vensim ple on windows 8. I have a variable called population that has been classified into childhood, young age, middle age and old age using an aging chain.Corresponding to population, I have another variable called total aggregate wealth that ...
by swati
Tue Jun 14, 2016 2:20 pm
Forum: Vensim
Topic: problem in formulating auxiliary equation
Replies: 4
Views: 3173

Re: problem in formulating auxiliary equation

Thanks :) my problem got solved.it was a very trivial thing.
by swati
Tue Jun 14, 2016 2:36 am
Forum: Vensim
Topic: problem in formulating auxiliary equation
Replies: 4
Views: 3173

Re: problem in formulating auxiliary equation

I am using vinsem ple x32 on windows 8. i am not clicking the variables in equation box. i have attached my model, incase if you want to see.The variable fish death rate is creating problems.
by swati
Mon Jun 13, 2016 4:05 pm
Forum: Vensim
Topic: problem in formulating auxiliary equation
Replies: 4
Views: 3173

problem in formulating auxiliary equation

Hi I have just started learning Vensim.I have been referring to MIT OCW roapmaps. One recurring problem which I am facing is when i formulate equation for an auxiliary variable.For example, I have an auxiliary variable called death rate. The equation for death rate is defined as population * death f...