Ventana software support forum

Hi there.

I'm new to Vensim so I'm wondering if somebody could assist me wrt Subscripts. I've defined a subscript and placed a Box Variable in which I want to define the elements of the subscript as other Variables- i.e., I want the elements of the subscript to be variables - is this possible? I've tried doing this, but I keep getting error messages.

Previously, I've defined the subscript by constants - i.e., 1,2,3,4,5 which is fine but I can't define it as var1,var2,var3,var4,var5

Thanks for your help.

Nik

It is not clear exactly what you are trying to accomplish but subscripts can only be defined symbolically and their elements can't be anything but that - subscript elements. There is a chapter in the User's Guide on subscripts that might be helpful in understanding how they work.

Thanks Bob.

All I really want to do is to combine five variables onto one graph. I therefore thought that if I created a subscript called 'lines', I could make the five variables, elements of the graph - i.e, the equation would read:

graph[lines]=var1,var2,var3,var4,var5

Thanks.

Nik

Now I understand. You will need to write

graph[line1]=var1~~|
graph[line2]=var2~~|
graph[line3]=var3~~|

And so on (use the Add Eq button in the equation editor). Of course it may be easier to just make a custom graph.

[Edited on 2006-4-25 by bob@vensim.com]