Ventana software support forum

Dear Admin..


Thanks a lot..!! that's awesome.. it works now. Thank you so much helping for solving my problem

Hi, I need help in solving this issue. I tried to make a simple model with 2 subscripts, both function of time (vector lookup) . I could solve the model without any error (see model test vector-OK.mdl) and got the results as I expected. However when I add another auxiliary as multiplier (this could ...

Attached please my simple model of age structure (The Excell and Vensim model). In this model, Let say I have three age groups, each group has 12 month time period. The initial value of group 1 I put constant number, for the next group (age 2), the initial value will be determined by the value at ti...

Dear Tom.. Thanks so much for your help..the iteration works now... Just one last silly question I would like to ask..what is the syntax for the initial point to make it automatic.. ie. I want to have that the initial point of the next y is the last value of x at previous year. At this stage I did i...

Thank you Tom for your response. I might have made a mistake in my email.. as you see from my excel file, the value of y at time t (month) will depend the value of x at previous month, so in excell the formula will look like y(t) = ax(t-1). so it's not the same variable, but involving different two ...

Hi I have a simple question, I have to solve difference equation whereby the next stock level is determined by the previous one i.e x(t+1)= ax(t)+ b How do I do this in vensim? I am attaching excel file and basic vensim model, please advice me on this matter. I have 12 age level in the model and I a...