If the endpoint is fixed, you can use the approach of creating a variable.
If the endpoint is uncertain, specifically, not known at the start of the run, there isn't really a way to do this, except by postprocessing the output in some other tool (Excel, R, Python ...)
Search found 3800 matches
- Wed Dec 06, 2023 3:35 pm
- Forum: Vensim
- Topic: Uniform data
- Replies: 2
- Views: 3143
Re: Uniform data
You can use these distributions either in equations, or via the sensitivity (Monte Carlo) tool.
- Tue Dec 05, 2023 4:36 pm
- Forum: Vensim
- Topic: older interface PLE 10.1.3
- Replies: 2
- Views: 3013
Re: older interface PLE 10.1.3
Is there something specific that you need from the older interface?
- Tue Dec 05, 2023 2:32 pm
- Forum: Vensim
- Topic: time schedule
- Replies: 4
- Views: 3657
Re: time schedule
There isn't a way to link to a spreadsheet in PLE.
- Wed Nov 29, 2023 3:34 pm
- Forum: Vensim
- Topic: Output File
- Replies: 6
- Views: 4700
Re: Output File
Or perhaps what you're looking for is an export of the dataset to Excel? Use Model>Export Dataset.
- Thu Nov 16, 2023 5:13 pm
- Forum: Ventity
- Topic: Function: choose
- Replies: 4
- Views: 4516
Re: Function: choose
I think there's an efficiency issue here. Because the 'identify' and 'update' triggers are in the Region entity, they're executing multiple times - i.e. every region is identifying the best region. I can think of a couple alternatives. - Move the trigger to a singleton entity like the Model. Putting...
Re: Lifecycle
1 - the PULSE TRAIN function might work
2 - you can solve this, but it may not be the best choice - https://metasd.com/2017/01/forrester-on ... ous-flows/
2 - you can solve this, but it may not be the best choice - https://metasd.com/2017/01/forrester-on ... ous-flows/
Re: Lifecycle
For inspiration, you might look to
C:\Users\Public\Vensim\Models\Sample\EXTRA\COMMOD.MDL
which installs with Vensim.
C:\Users\Public\Vensim\Models\Sample\EXTRA\COMMOD.MDL
which installs with Vensim.
Re: Lifecycle
I think your first step should be to adopt standard stock-flow notation in your diagram. Currently you have no flows, so your are integrating earlier age categories directly into later age categories, like Bull= INTEG ( -Bull+"Bullock 12-18", 0) Units: number ******************************...
- Fri Nov 10, 2023 5:40 pm
- Forum: Vensim
- Topic: Coustom grafics get lost
- Replies: 6
- Views: 3212
Re: Coustom grafics get lost
I think this is already ticketed - it's happening in other models as well. I was under the impression that 10.1 fixed it.
- Fri Nov 03, 2023 2:10 pm
- Forum: Vensim
- Topic: Vensim documentation compatible with MS Word
- Replies: 5
- Views: 4081
Re: Vensim documentation compatible with MS Word
When I use File>Save from the Document tool window, I get the usual Save As dialog with type .txt, prompting me to name the file. The default location is the folder containing the model. Do you get a different behavior? Are you using v10 and the new gui?
- Thu Nov 02, 2023 10:57 pm
- Forum: Vensim
- Topic: Bug: Very precise time settings for model
- Replies: 7
- Views: 4771
Re: Bug: Very precise time settings for model
I think the task here is actually a little bigger. Since .vdfx went to double precision, there's been a mismatch between the engine/output numerical precision and text precision. For example, you can read in a constant from a .cin file as a float or a double, but a constant in an equation gets trunc...
- Thu Nov 02, 2023 6:36 pm
- Forum: Vensim
- Topic: inserting picture to comment failed due to permissions problem
- Replies: 4
- Views: 1864
Re: inserting picture to comment failed due to permissions problem
Judging by the paths, this has to be Windows, so the key question is what Vensim version?
- Thu Nov 02, 2023 2:49 pm
- Forum: Vensim
- Topic: Vensim documentation compatible with MS Word
- Replies: 5
- Views: 4081
Re: Vensim documentation compatible with MS Word
File>Publish is unrelated to the Doc tool. You probably just want to click the Doc tool and save the resulting window.
- Thu Nov 02, 2023 2:47 pm
- Forum: Vensim
- Topic: Vensim Equation Auditing?
- Replies: 5
- Views: 1824
Re: Vensim Equation Auditing?
There isn't (but probably should be). Here's a trick I've used for this. Run the model, and export the run to a .tab file with time across and subscripts in their own columns. Deselecting units keeps things simple. Open the result in Excel. You can now count the output. Anything with a value in just...
- Thu Nov 02, 2023 2:39 pm
- Forum: Vensim
- Topic: inserting picture to comment failed due to permissions problem
- Replies: 4
- Views: 1864
Re: inserting picture to comment failed due to permissions problem
The permission issue seems weird, given the path. Presumably that's your own doc folder, and you have permission. I'm guessing that the message is misleading, and something else is causing it. Did you deliberately try to access these three folders, or was Vensim apparently on some kind of fishing ex...
- Thu Nov 02, 2023 2:33 pm
- Forum: Vensim
- Topic: insert picture into Aux / Stock variable?
- Replies: 1
- Views: 524
Re: insert picture into Aux / Stock variable?
It's not currently possible, but I agree that it would be nice. I'll ticket the feature request.
- Wed Nov 01, 2023 2:17 pm
- Forum: Vensim
- Topic: Bug: Very precise time settings for model
- Replies: 7
- Views: 4771
Re: Bug: Very precise time settings for model
I think we can have our cake and eat it too here.
- Mon Oct 30, 2023 9:13 pm
- Forum: Vensim
- Topic: Suppress simulation information window
- Replies: 3
- Views: 2460
Re: Suppress simulation information window
I think it's a bug - there are a few instances of warnings that ignore the settings check.
- Mon Oct 30, 2023 9:12 pm
- Forum: Vensim
- Topic: Vensim 10.1.1 macOS GUI Bug
- Replies: 8
- Views: 3844
Re: Vensim 10.1.1 macOS GUI Bug
I think this is an instance of one we're working on ... seems to be random breakage of the GUI library. Are you using Sonoma or Ventura or another OS version?
- Mon Oct 30, 2023 9:09 pm
- Forum: Vensim
- Topic: Random number generator; any tips to replicate?
- Replies: 15
- Views: 9661
- Mon Oct 30, 2023 9:07 pm
- Forum: Vensim
- Topic: Random number generator; any tips to replicate?
- Replies: 15
- Views: 9661
Re: Random number generator; any tips to replicate?
Restating what I stated above for clarity: If a modeler wanted every RANDOM-based function in a model to be independent of all of the others (not drawing from the same pool), then the functions should be called with different STREAM_IDS (https://www.vensim.com/documentation/stream_id.html). Someone...
- Mon Oct 30, 2023 9:03 pm
- Forum: Vensim
- Topic: Random number generator; any tips to replicate?
- Replies: 15
- Views: 9661
Re: Random number generator; any tips to replicate?
For instance, a model has RANDOM_UNIFORM and RANDOM_NORMAL, and is run to generate output1.vdfx. If a user then deletes the UNIFORM() function in one portion of the model and adds a UNIFORM() function in a different part of the model, will the functions be called in the same order? Will the random ...
- Mon Oct 30, 2023 8:56 pm
- Forum: Vensim
- Topic: Vensim DSS Crashing on Save When Viewing As Sketch
- Replies: 5
- Views: 946
Re: Vensim DSS Crashing on Save When Viewing As Sketch
This has a lot of undefined variables that appear as A FUNCTION OF() in the text listing. Was the last operation before the crash a huge paste/replicate or something? There's some other strange stuff, like the string STX{...} in one equation. Do you have a previous edition of the model for compariso...
- Fri Oct 27, 2023 7:57 pm
- Forum: Vensim
- Topic: BUG? Control-<number> not select analysis tool
- Replies: 4
- Views: 1970
Re: BUG? Control-<number> not select analysis tool
Sounds like a bug, because it's still working on Win10 (assuming you're using a Mac).