I have a problem with my Vensim model. my final time is 10 years and in setting I chose initial time= o and final time=10 but in simulation, my model is shown only for 2 years?
please help me?
adjust final time
-
- Super Administrator
- Posts: 4573
- Joined: Wed Mar 05, 2003 3:10 am
Re: adjust final time
Can you upload the model so we can take a look? It could be a number of things that is causing this.
Advice to posters seeking help (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
Re: adjust final time
yes, sure.
I'm looking forward to your guide.
thanks
I'm looking forward to your guide.
thanks
- Attachments
-
- 2.mdl
- (7.11 KiB) Downloaded 182 times
-
- Super Administrator
- Posts: 4573
- Joined: Wed Mar 05, 2003 3:10 am
Re: adjust final time
It only runs to 2 as you have a floating point error which stops the simulation.
Given the size numbers you are dealing with, I'd suggest converting them to "million people" instead of "people". This will probably fix the floating point error.
Given the size numbers you are dealing with, I'd suggest converting them to "million people" instead of "people". This will probably fix the floating point error.
Advice to posters seeking help (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine-27509559
Re: adjust final time
thank you very much.
Re: adjust final time
The likely cause is a division by zero or runaway exponential, perhaps from a feedback loop with the wrong polarity.
/*
Advice to posters (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Blog: http://blog.metasd.com
Model library: http://models.metasd.com
Bookmarks: http://delicious.com/tomfid/SystemDynamics
*/
Advice to posters (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Blog: http://blog.metasd.com
Model library: http://models.metasd.com
Bookmarks: http://delicious.com/tomfid/SystemDynamics
*/