Ventana software support forum

This may be due to screen resolution that's not sufficient to show everything. You can modify your toolset with Tools>Analysis Toolset>Modify, or shrink the icons with Tools>Options>Toolbars.

What exactly are you doing when this happens? Can you post a screenshot?

I have no trouble adding dimensions to your example.

Yes - we haven't planned that piece yet, but we consider it to be important. We could potentially even support a similar syntax, though some things like arrays will have to differ. Is there anything in particular you'd like to see improved?

You don't need to write out the full combinatorial explosion. What you want probably looks something like this:

share[k] = attractiveness[k]/SUM(attractiveness[k!])
attractiveness[k] = EXP( alpha*has license[k] + beta*is female[k] + gamma*likes cats[k] + ... )

Understood. There is an equation listing, though we haven't paid much attention to it lately. What if that were beefed up a bit, with editable entries and search & replace?

This is pretty close to what you're asking for: You could refine it further, or do something with SAMPLE IF TRUE, if you need the downward lag to be literally 0, though that might be unrealistic.

The IROR function is supposed to return :NA: when it fails to converge. You could use an IF THEN ELSE to check for result=:NA: and then substitute a value. Does that do what you want?

What version are you using?

Can you post your .vsc (sensitivity control) file? Or just paste in the text or a screenshot?

A reusable equation can be implemented as a MACRO function. If you're looking to parameterize a lookup, that's the VECTOR LOOKUP function. https://www.vensim.com/documentation/22145.htm https://www.vensim.com/documentation/fn_vector_lookup.htm A quick way to test a lookup's behavior is to use a Synt...

This should definitely work. Take a look at the sample models attached to the help:
http://www.vensim.com/documentation/fn_get_xls_data.htm

Text and spreadsheets only support 2D input, for obvious reasons. If you have many dimensions, you can either use a number of files or worksheet tabs with GET XLS and GET DIRECT, or you could put the material in a database and use ODBC.

The file is called vensimdll.err, and there's a search hierarchy for its location: 0. The path specified in the VENSIMERROR environment variable - you can set this with setenv() 1. The location of the .dll executable 2. A Vensim directory in the system appdata directory, appdata\Vensim 3. The path s...

Hi JJ - Ventity may not ever have a text editor. You can use the inspectors for a list view of equations though, and it permits deletion. In general, the modularity of entities is a lot better than the grouping in Vensim. You can, for example, reuse an entity in another model just by importing it. A...

It will - soon, I hope.

This is fixed in the latest release. Unfortunately there are a couple of other glitches in the input data infrastructure, but they don't cause rework like this does.

Yeah - the build system has two numbering schemes going. Doesn't matter.

Not quite as complete, but here's the Ventity equivalent:

Here's the inventory setup, without the price dynamics.

Via email: We've just uploaded a new Ventity beta (build 654) that extends the beta license through Jan. 2016. Some of the bigger changes are documented in the Release Notes (see "What's New" in the Help system), but there are also many small usability improvements, particularly to things ...

You can use the VECTOR LOOKUP function to parameterize your lookup points as an array of constants. Or, you can create a function to shift or stretch your lookup results, according to a few parameters. For example: effect of price = price sensitivity * price effect lookup( price/normal price ) + (1-...

This helps a lot. I think I see several ways to do it. It would actually be a little easier in Ventity I think, analogous to the cohort model here http://www.ventanasystems.co.uk/forum/v ... =48&t=6083, but the tool isn't as mature.

I'll cook up an example.

I think we need to know a little more about the problem. For example, are the commodities all the same, but for their value? Do all commodities from a given day evolve their value in the same way?

Thanks for the straightforward feedback. I think the right mindset is that Ventity is only preferred at the moment for problems where you need for one of its core language benefits: - lists with arbitrary dimensionality of the members, as in a marketing mix model where one product has 7 packages, an...

There will be a release very shortly to remedy this.

My guess is that you added the Pasture attribute after creating the builtin dataset that populates the cows, right? Unfortunately, there's a bug that prevents the dataset from updating to reflect the new attribute. If you create a new builtin dataset, the Pasture column should be included. This'll b...