Search found 4585 matches
- Sun Apr 21, 2024 8:02 am
- Forum: Vensim
- Topic: Death by Subscript
- Replies: 5
- Views: 120
Re: Death by Subscript
The SUM function is used over a subscript range, and you can think of subscripts as an array. Looking at the equation you are trying to implement, there is a sum over "n". So you would define the subscript range as n : (n1-n2). But I cannot see "n" in the equation you've entered ...
- Wed Apr 17, 2024 7:18 am
- Forum: Vensim
- Topic: Vensim-Integration-with-External-Applications
- Replies: 1
- Views: 101
Re: Vensim-Integration-with-External-Applications
- How I can achieve this objective to supply this data ( Rates R1, R2, R3 and R4) to Vensim Model dynamically (as they are changing every hour) to generate simulations? You would need Vensim PLE+, Pro or DSS to link to external data. One way you can do it in PLE is to use a lookup table. - Is there...
- Mon Apr 15, 2024 7:08 am
- Forum: Vensim
- Topic: SINTEG with vars
- Replies: 4
- Views: 113
Re: SINTEG with vars
This is correct (it's mentioned in the help system that the min/max etc must be numbers).
https://www.vensim.com/documentation/fn ... l?q=sinteg
https://www.vensim.com/documentation/fn ... l?q=sinteg
- Mon Apr 15, 2024 7:06 am
- Forum: Vensim
- Topic: Integration techniques: Impacts on Stock behavior
- Replies: 5
- Views: 193
Re: Integration techniques: Impacts on Stock behavior
It's impossible to offer any advice without a model to look at.
- Mon Apr 15, 2024 7:05 am
- Forum: Vensim
- Topic: Odd occurance of Vensim freezing system with no run name BUT ...
- Replies: 3
- Views: 118
Re: Odd occurance of Vensim freezing system with no run name BUT ...
What version of Vensim are you using and on Mac or Windows?
I've just tried this on the latest version and it seems fine.
I've just tried this on the latest version and it seems fine.
- Sun Apr 14, 2024 4:37 am
- Forum: System Dynamics Discussion
- Topic: World 3 Model Download
- Replies: 5
- Views: 240
Re: World 3 Model Download
At the foot of the page, it details where you can find them on your computer. The location of the Models directory varies by platform. Normally the full path for this directory is •c:\Documents and Settings\All Users\Vensim\Models (Windows XP), •c:\Users\Public\Vensim\Models (Windows Vista/7/8/10/11...
- Fri Apr 12, 2024 3:19 pm
- Forum: Vensim
- Topic: downloading 32 or 64 bit Python version for web publishing
- Replies: 4
- Views: 154
Re: downloading 32 àr 64 vit Python version for web publishing
I don't think it actually matters. During development we used the 32 bit version, but I'm sure 64 bit will work fine too.
- Fri Apr 12, 2024 12:33 pm
- Forum: Vensim
- Topic: Chart with two axes (primary and secondary) consult
- Replies: 2
- Views: 116
Re: Chart with two axes (primary and secondary) consult
Create a custom graph, add two variables and make sure you do not click the "Inherit scale" checkbox for the 2nd variable.
- Thu Apr 11, 2024 8:28 am
- Forum: System Dynamics Discussion
- Topic: Floating Point Error
- Replies: 1
- Views: 66
Re: Floating Point Error
You will need to upload the model.
It's either division by zero, or one of your variables is exponentially growing. Impossible to say without seeing the model.
It's either division by zero, or one of your variables is exponentially growing. Impossible to say without seeing the model.
- Tue Apr 09, 2024 11:35 am
- Forum: Vensim
- Topic: CMD script macOS problem
- Replies: 6
- Views: 158
Re: CMD script macOS problem
This fires up the command script successfully for me (run from a terminal prompt)
/Applications/VensimDSS.app/Contents/MacOS/VensimDSS /Users/tony/Downloads/TravisForumProblem/SampleCMDScript.cmd
/Applications/VensimDSS.app/Contents/MacOS/VensimDSS /Users/tony/Downloads/TravisForumProblem/SampleCMDScript.cmd
- Tue Apr 09, 2024 11:24 am
- Forum: Vensim
- Topic: CMD script macOS problem
- Replies: 6
- Views: 158
Re: CMD script macOS problem
What happens if you turn off
SPECIAL>NOINTERACTION
SPECIAL>NOINTERACTION
- Mon Apr 08, 2024 5:30 pm
- Forum: System Dynamics Discussion
- Topic: World 3 Model Download
- Replies: 5
- Views: 240
Re: World 3 Model Download
Are you on Mac or Windows?
Take a look at the following page, it details exactly where to find the models on Mac/Windows.
https://www.vensim.com/documentation/models.html
Take a look at the following page, it details exactly where to find the models on Mac/Windows.
https://www.vensim.com/documentation/models.html
- Mon Apr 08, 2024 8:07 am
- Forum: Vensim
- Topic: Lables on Flows
- Replies: 2
- Views: 885
Re: Lables on Flows
Looking in more detail at this, if you move the variable attached to the flow, it does move to the correct place. The next release will have this fixed.
- Sat Apr 06, 2024 6:44 am
- Forum: Vensim
- Topic: Help me with Staff model
- Replies: 5
- Views: 156
Re: Help me with Staff model
All in the help system including examples.
https://www.vensim.com/documentation/fn ... ml?q=queue
https://www.vensim.com/documentation/fn ... ml?q=queue
- Sat Apr 06, 2024 6:43 am
- Forum: System Dynamics Discussion
- Topic: World 3 Model Download
- Replies: 5
- Views: 240
Re: World 3 Model Download
It's available with Vensim.
On Windows, you should find it in
C:\Users\Public\Vensim\Models\Sample\WRLD3-03
On Windows, you should find it in
C:\Users\Public\Vensim\Models\Sample\WRLD3-03
- Fri Apr 05, 2024 5:13 pm
- Forum: Vensim
- Topic: Help me with Staff model
- Replies: 5
- Views: 156
Re: Help me with Staff model
You could also consider a queue instead as you can remove things from one of those.
- Fri Apr 05, 2024 3:07 pm
- Forum: Vensim
- Topic: Help me with Staff model
- Replies: 5
- Views: 156
Re: Help me with Staff model
I'd start by removing "people quitting" and thinking about implementing it in a different way. The equation is too complex for that anyway. As you are directly delaying "People to train" to calculate "People trained", if you do have people quitting, "Training"...
- Wed Apr 03, 2024 3:41 pm
- Forum: Vensim
- Topic: Vensim PLE Plus 10.1.3 - Monte Carlo Button
- Replies: 2
- Views: 105
- Wed Mar 27, 2024 1:36 pm
- Forum: Vensim
- Topic: double-click selection
- Replies: 5
- Views: 1929
Re: double-click selection
No, there are hundreds of places in Vensim where you can select text, that's why I asked for more info.
- Tue Mar 26, 2024 1:06 pm
- Forum: System Dynamics Discussion
- Topic: Cumulative flow does not match stock
- Replies: 2
- Views: 1716
Re: Cumulative flow does not match stock
1. Does your model pass the units test?
2. Have you selected an appropriate time step? https://www.vensim.com/documentation/ref_time_step.html
It's impossible to comment further without the model.
2. Have you selected an appropriate time step? https://www.vensim.com/documentation/ref_time_step.html
It's impossible to comment further without the model.
- Mon Mar 25, 2024 9:09 pm
- Forum: Vensim
- Topic: double-click selection
- Replies: 5
- Views: 1929
Re: double-click selection
Can you provide more detail please? Where are you clicking things? Can you give an example?
- Mon Mar 25, 2024 6:58 pm
- Forum: Vensim
- Topic: Lables on Flows
- Replies: 2
- Views: 885
Re: Lables on Flows
We'll get this fixed as soon as possible.
- Sat Mar 23, 2024 8:55 pm
- Forum: Vensim
- Topic: Vensim 8.0.0 download
- Replies: 3
- Views: 1017
Re: Vensim 8.0.0 download
8.0.0 does not even run on modern Macs, you are best off using the latest version.
- Sat Mar 23, 2024 6:27 pm
- Forum: Vensim
- Topic: Floating Point Error
- Replies: 3
- Views: 982
Re: Floating Point Error
To give you a little more help, try this burning of coal = min ( available coal resources / time step , base burning rate ) This equation burns the "base burning rate" until all the "available coal resources" are used up. This equation takes "base burning rate" from the...
- Sat Mar 23, 2024 6:24 pm
- Forum: Vensim
- Topic: Floating Point Error
- Replies: 3
- Views: 982
Re: Floating Point Error
You do have units errors in your model.
Start with "base burning rate". That should not be measured in 1/year, I'm pretty certain it will be tonnes/year. Same for "base discovery rate". Correct the units for these, and you'll see where the error is.
Start with "base burning rate". That should not be measured in 1/year, I'm pretty certain it will be tonnes/year. Same for "base discovery rate". Correct the units for these, and you'll see where the error is.