Hi Tom,
Sometimes the optimization result comes with a star (*) ahead of a parameter being optimized. Something like the following:
Maximum payoff found at:
*Inventory of products = 5e+007
What does the star (*) mean? I remember there are some old posts in which people asked the same question, however I have tried to search those posts but failed to locate them. Vensim Help seems to not explain it, despite that the examples of optimization show star signs, too. (Maybe there is some explanation but I could not find it).
Many thanks for your time.
Star (*) sign in optimization result
-
- Senior Member
- Posts: 105
- Joined: Wed Oct 25, 2017 3:52 pm
- Vensim version: PRO
Re: Star (*) sign in optimization result
I think it just indicates that the value changed on the last pass through the parameters.
/*
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
*/
-
- Senior Member
- Posts: 105
- Joined: Wed Oct 25, 2017 3:52 pm
- Vensim version: PRO
Re: Star (*) sign in optimization result
Hi Tom, thanks, however I cannot understand what you meant by "value changed on the last pass through the parameters". Please could you elaborate a bit further? Many thanks.
Re: Star (*) sign in optimization result
The optimizer makes multiple passes through the vector of parameters (or later, of general search directions). I think the * indicates improvement was found.
/*
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
*/