Search found 3808 matches
- Fri Dec 29, 2023 4:02 pm
- Forum: Vensim
- Topic: Solving for implicit functions before starting time
- Replies: 7
- Views: 11625
Re: Solving for implicit functions before starting time
Another option would be to put a table of solutions (Moody diagram) into a lookup or fitted function.
- Fri Dec 22, 2023 3:14 pm
- Forum: Vensim
- Topic: Can't view model as sketch
- Replies: 12
- Views: 13289
Re: Can't view model as sketch
This means there are syntax errors in the equations. Use Check Model <ctl><T> to see the error window.
- Fri Dec 22, 2023 3:13 pm
- Forum: Vensim
- Topic: download stel2ven.zip and/or stel2ven.exe
- Replies: 2
- Views: 4688
Re: download stel2ven.zip and/or stel2ven.exe
Newer Stella models are in XMILE, which you can import via the File menu.
- Fri Dec 22, 2023 3:12 pm
- Forum: Vensim
- Topic: Erased variables
- Replies: 2
- Views: 2830
Re: Erased variables
Whether variables remain in the model depends on user choice - when you delete a variable with the delete key, a dialog asks whether to remove them from the model or only the current view. You can find these variables by opening the Control Panel > Variables tab, and selecting the "orphans"...
- Sat Dec 16, 2023 10:52 pm
- Forum: Ventity
- Topic: Very strange behavior when I edit auxiliary names
- Replies: 1
- Views: 7902
Re: Very strange behavior when I edit auxiliary names
I can replicate this. Ticketed for the devs to take a look.
- Sat Dec 16, 2023 10:47 pm
- Forum: Ventity
- Topic: Ventity download
- Replies: 1
- Views: 5108
Re: Ventity download
It's working right now. There was an intermittent issue that seems to be resolved with our last web site update. Sorry for the issue.
- Fri Dec 15, 2023 4:58 pm
- Forum: Vensim
- Topic: Sub-Subscripts?
- Replies: 3
- Views: 3396
Re: Sub-Subscripts?
Notice here that the COUNTRIES range is built up hierarchically by first defining euro and non-euro subranges. That's not necessary however - you can mix & match ranges and elements. City : Boston, Las Vegas, Denver, San Diego, Seattle, New York East Coast : Boston, New York West Coast : San Die...
- Tue Dec 12, 2023 2:11 pm
- Forum: Vensim
- Topic: Level initial series
- Replies: 4
- Views: 4339
Re: Level initial series
It sounds like you want a population stock that's moving approximately alongside the data from 1995-2023, then reset the population stock to precisely match the data at 2023, then have the population evolve into the future by endogenous forces? If so, there are several ways to do this. The general i...
Re: Percent
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 ...)
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 ...)
- Wed Dec 06, 2023 3:35 pm
- Forum: Vensim
- Topic: Uniform data
- Replies: 2
- Views: 3848
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: 3742
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: 4398
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: 5583
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: 5259
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: 4075
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: 5259
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: 6245
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: 2003
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: 5259
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: 2166
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: 2003
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: 540
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.