Search found 6 matches

by johan
Wed Nov 05, 2008 11:44 am
Forum: Vensim
Topic: Changing Lookups during the simulation
Replies: 2
Views: 2342

Thanks a lot

Thanks a lot, Bob, I hope I can avoid quite some variables here :-)

Regards,
Johan
by johan
Wed Nov 05, 2008 10:05 am
Forum: Vensim
Topic: Changing Lookups during the simulation
Replies: 2
Views: 2342

Changing Lookups during the simulation

Hi,

I hope my question is specific enough this time:

I'm using Vensim PLE. I need something like LOOKUPs, but I want to change them within the run of the simulation.

Is this possible or is it the typical Array/Vector functionality that you find in the Professional version?

Thanks a lot,
Johan
by johan
Fri Oct 31, 2008 11:33 am
Forum: Vensim
Topic: electricity grid and forecasts
Replies: 5
Views: 3613

Hi Bob,

I will give SMOOTH a closer look. I especially will have to look at your [] notation, as I did not encounter arrays yet in Vensim.

I'll get back with very specific questions instead of a long description.

Thanks,
Johan
by johan
Thu Oct 30, 2008 7:10 pm
Forum: Vensim
Topic: electricity grid and forecasts
Replies: 5
Views: 3613

I thought about that, but..

Hi JJ, I thought about that, but I hoped I could get a hint on what data structure to use. The alternative is that I start rather directionless, and ask help on eg. lookups, just to discover that a lookup is not the solution and come back to ask about some othervariable type. But in the end, I'm the...
by johan
Thu Oct 30, 2008 2:36 pm
Forum: Vensim
Topic: electricity grid and forecasts
Replies: 5
Views: 3613

electricity grid and forecasts

Dear all, I'm trying to model some aspects of an energy distribution grid, especially the interaction between prognoses and real time usage of the grid. As an Introduction: In the german grid people announce their schedules a day in advance. To do this they need a forecast. The real time consumption...
by johan
Thu Oct 30, 2008 1:13 pm
Forum: System Dynamics Discussion
Topic: Explaining System Dynamics to others
Replies: 6
Views: 9307

chicken and egg?

Isn't the chicken-and-egg problem a basic SD example? You can't answer the question who was first, the chicken or the egg. You have to look at the chicken-and-egg system.

[Edited on 10-30-2008 by johan]