Hi everybody
is there any way to have, in Vensim PLE, an x,y diagram with x in Ln scale? Please do not suggest to use Ln(x) sice it does not work...
I mean a true logaritmic scale...
All the best.
Lorenzo
Logaritmic scale
-
- Senior Member
- Posts: 102
- Joined: Wed Jul 30, 2014 7:09 am
- Vensim version: PLE
Re: Logaritmic scale
At present, you'd have to create a variable containing ln(x) and use that for the x axis of your custom graph.
We're currently reworking all the graphics, and this is definitely on the list for the future.
We're currently reworking all the graphics, and this is definitely on the list for the future.
/*
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: 102
- Joined: Wed Jul 30, 2014 7:09 am
- Vensim version: PLE
Re: Logaritmic scale
Hi tomfid
thank you for your (according to me wrong) answer... if ideed x spans over the interval (0,100) you get also negative values and not a logaritmic scale.
All the best.
Lorenzo
thank you for your (according to me wrong) answer... if ideed x spans over the interval (0,100) you get also negative values and not a logaritmic scale.
All the best.
Lorenzo
Re: Logaritmic scale
I'm not sure what you mean. Log(0) is undefined and therefore won't be on any scale. Log(x) for x<1 is negative. So I guess you're referring to the scale labels, which you would like to read 0.01, .1, 1, 10, 100 rather than -2, -1, 0, 1, 2? Unfortunately there's no way to do that at the moment.
/*
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: 102
- Joined: Wed Jul 30, 2014 7:09 am
- Vensim version: PLE
Re: Logaritmic scale
Hi tomfid
you hit the point....I suggest this as an extension for a future version of Vensim.
All the best.
Lorenzo
you hit the point....I suggest this as an extension for a future version of Vensim.
All the best.
Lorenzo
Re: Logaritmic scale
OK, thanks!
/*
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
*/