Will the stats tool do what you need?
http://www.vensim.com/documentation/ind ... _stats.htm
Search found 4585 matches
- Sat Dec 22, 2012 11:18 am
- Forum: Vensim
- Topic: Display mean of a Box Variable?
- Replies: 2
- Views: 1953
- Fri Dec 21, 2012 9:28 am
- Forum: System Dynamics Discussion
- Topic: Loop formation as par system dynamics theory
- Replies: 4
- Views: 5225
Re: Loop formation as par system dynamics theory
I would agree that there are two loops. I don't remember seeing any specific "rules" anywhere for SD though. The most important part of modelling is that the model works and helps you understand the problem you are trying to solve. Have you been through the PLE tutorial at the following ad...
- Thu Dec 20, 2012 8:18 pm
- Forum: Vensim
- Topic: IF THEN ELSE(300000< scope<=700000,720,0 )
- Replies: 5
- Views: 3232
Re: IF THEN ELSE(300000< scope<=700000,720,0 )
Define them as constants. If someone showed me that equation, I would have no idea what the 300000, 700000 and 720 mean. Add them as constants and you can easily experiment by running SyntheSim and moving the sliders.
- Thu Dec 20, 2012 7:59 pm
- Forum: Vensim
- Topic: IF THEN ELSE(300000< scope<=700000,720,0 )
- Replies: 5
- Views: 3232
Re: IF THEN ELSE(300000<Excavation scope<=700000,720,0 )
How to write this equation in vensim... I'm using PLE IF THEN ELSE(300000< scope<=700000,720,0 ) Production rate =720 m/hr if then else ( 300000 < scope :and: scope <= 700000 , 720 , 0 ) I would avoid putting numbers in there though. Make them constants like if then else ( lower bound < scope :and:...
- Thu Dec 20, 2012 3:02 pm
- Forum: Vensim
- Topic: VENAPP: TEXTMENU
- Replies: 6
- Views: 3474
Re: VENAPP: TEXTMENU
Can you upload the venapp so we can take a look?
- Thu Dec 20, 2012 2:12 pm
- Forum: Vensim
- Topic: How to model scheduled order releases?
- Replies: 8
- Views: 4455
Re: How to model scheduled order releases?
None that I know of. Demand in the UK has been low for the past two years, I suppose it would be even lower in Australia.No Vensim training in Australia at all?
- Thu Dec 20, 2012 1:57 pm
- Forum: Vensim
- Topic: vensim_show_sketch and VBA
- Replies: 5
- Views: 3290
Re: vensim_show_sketch and VBA
It's just an image.
- Thu Dec 20, 2012 10:28 am
- Forum: Vensim
- Topic: How to model scheduled order releases?
- Replies: 8
- Views: 4455
Re: How to model scheduled order releases?
Tougher to evaluate Vensim vs iThink when only PLE is on trial (still, iThink trial models cannot be saved which is vexing when they crash). I can issue a trial for one of the other versions if you want. The following may help. http://www.vensim.com/comparison.html Vensim (at least PLE) seems to ha...
- Thu Dec 20, 2012 10:24 am
- Forum: Vensim
- Topic: vensim_show_sketch and VBA
- Replies: 5
- Views: 3290
Re: vensim_show_sketch and VBA
All the vensim_show_sketch function does is draw into the window that is provided.
If the window is covered, or too small, you need to change the code for the form to make it work.
If the window is covered, or too small, you need to change the code for the form to make it work.
- Wed Dec 19, 2012 5:36 pm
- Forum: Vensim
- Topic: vensim_show_sketch and VBA
- Replies: 5
- Views: 3290
Re: vensim_show_sketch and VBA
It looks like you are getting a sketch, but the container window is too small. What happens if you increase it's size?
- Wed Dec 19, 2012 5:33 pm
- Forum: Vensim
- Topic: How to model scheduled order releases?
- Replies: 8
- Views: 4455
Re: How to model scheduled order releases?
Start by making the units for your rates Million litres\day. For example, nominations = nomination yorn * Nomination Quantity / time step units : Million litres\day the division by time step makes sure that you nomination quantity will be emptied at a specific time step. Your model may have been pro...
- Wed Dec 19, 2012 8:55 am
- Forum: Vensim
- Topic: How to model scheduled order releases?
- Replies: 8
- Views: 4455
Re: How to model scheduled order releases?
Can you post the model so we can see the unit errors?
- Tue Dec 18, 2012 3:01 pm
- Forum: Vensim
- Topic: How to model random delay within min/max?
- Replies: 6
- Views: 3899
Re: How to model random delay within min/max?
In another tool I vaguely remember using a random number generation step and then, separately, an equation that draws on that random number to effect a delay. That is exactly what you do in Vensim as well. First generate the random number http://www.vensim.com/documentation/index.html?fn_random.htm...
- Tue Dec 18, 2012 2:41 pm
- Forum: Vensim
- Topic: type and priority in RC are not working
- Replies: 4
- Views: 3458
Re: type and priority in RC are not working
Thanks JJ, I'll raise it as a bug.
- Sun Dec 16, 2012 1:41 pm
- Forum: Vensim
- Topic: Restoring a Stock value to zero
- Replies: 2
- Views: 1802
Re: Restoring a Stock value to zero
Create an outflow, the equation should be
That will empty it when trigger = 1.
Code: Select all
if then else ( trigger = 1 , stock / time step , 0 )
- Thu Dec 06, 2012 5:41 pm
- Forum: Vensim
- Topic: VENAPP: LOADMODEL
- Replies: 4
- Views: 2601
Re: VENAPP: LOADMODEL
Are you able to upload the model and VCD so we can take a look?
- Thu Dec 06, 2012 4:05 pm
- Forum: Vensim
- Topic: VENAPP: Workbench Doc with multiple equations
- Replies: 1
- Views: 1694
Re: VENAPP: Workbench Doc with multiple equations
To list the other equations, you will need to ensure that all the other subscript combinations are selected (via SPECIAL>SUBSCRIPT|range|elem1|elem2|elmn).
- Tue Dec 04, 2012 12:02 pm
- Forum: Vensim
- Topic: Upgrading from Windows 7 to 8
- Replies: 2
- Views: 2197
Re: Upgrading from Windows 7 to 8
Vensim works fine on Windows 8 so that should be ok.
The bigger question is getting used to the new GUI in Windows 8 (I'm finding it tricky).
The bigger question is getting used to the new GUI in Windows 8 (I'm finding it tricky).
- Mon Dec 03, 2012 1:03 pm
- Forum: Vensim
- Topic: Reliability and validity along with reality check option
- Replies: 29
- Views: 41487
Re: Reliability and validity along with reality check option
If I do check/compare the model result manually with the real output, can it be sufficient for reliability check? No. If the model matches real data, then that is a good sign that the model is working correctly. If I check through "Model Check" and "Unit Check", is it sufficient...
- Thu Nov 29, 2012 10:45 am
- Forum: Vensim
- Topic: problem with subscripted reality check
- Replies: 2
- Views: 2141
Re: problem with subscripted reality check
Hello JJ, I'm not as familiar with reality check as I should be, but I'll do my best to help. Hopefully Tom will find time today to take a quick look and offer some advice as well. I'd say use the 2nd construct of the reality check. As you say, it will continue to work no matter how large the "...
- Wed Nov 28, 2012 9:18 am
- Forum: Vensim
- Topic: Upgdrading old VENSIM DSS Software
- Replies: 1
- Views: 1606
Re: Upgdrading old VENSIM DSS Software
Hello,
All you do is log into the download area at
http://www.vensim.com/php-bin/download.html
From here you can upgrade or extend the maintenance on your licence.
If you want a formal quote, email me at vensim@vensim.com with your licence details and I'll be happy to help.
Tony.
All you do is log into the download area at
http://www.vensim.com/php-bin/download.html
From here you can upgrade or extend the maintenance on your licence.
If you want a formal quote, email me at vensim@vensim.com with your licence details and I'll be happy to help.
Tony.
- Tue Nov 27, 2012 3:47 pm
- Forum: Vensim
- Topic: want to get Model Reader 5.11A
- Replies: 3
- Views: 2729
Re: want to get Model Reader 5.11A
Thanks for the bug report, I'll see if I can get it fixed quickly.
- Tue Nov 27, 2012 9:26 am
- Forum: Vensim
- Topic: want to get Model Reader 5.11A
- Replies: 3
- Views: 2729
Re: want to get Model Reader 5.11A
Can you explain why it is not working on the model reader 6.0?
- Sat Nov 24, 2012 12:50 pm
- Forum: Vensim
- Topic: Delayed System time
- Replies: 14
- Views: 11737
Re: Delayed System time
It would really help you a lot if you went through the whole tutorial at
http://www.public.asu.edu/~kirkwood/sysdyn/VenPLE.pdf
You need to look at the numbers and work out why they are not what you expect. The tutorial will take you though building a simple model and examining the output.
http://www.public.asu.edu/~kirkwood/sysdyn/VenPLE.pdf
You need to look at the numbers and work out why they are not what you expect. The tutorial will take you though building a simple model and examining the output.
- Fri Nov 23, 2012 9:41 pm
- Forum: Vensim
- Topic: VENAPP: Varformat error 0
- Replies: 3
- Views: 2442
Re: VENAPP: Varformat error 0
You can also try a Model->Reform/Clean and save the model again. This often solves a lot of things.
But it would also help if you could email the model/venapp to me as there may be a bug which I can look into and fix.
But it would also help if you could email the model/venapp to me as there may be a bug which I can look into and fix.