Search found 2724 matches

by tomfid
Tue Aug 06, 2019 9:08 pm
Forum: Ventity
Topic: using Visualizer without shapes
Replies: 4
Views: 134

Re: using Visualizer without shapes

It can be done by specifying "map item" entities, which are points with lat/lon.

We'll be bringing back the 3D visualizer for simpler non-GIS applications like this.
by tomfid
Tue Aug 06, 2019 8:27 pm
Forum: Ventity
Topic: Rabbits by color - help example
Replies: 3
Views: 402

Re: Rabbits by color - help example

At the moment, I don't think so. I'll see if I can think of a workaround.
by tomfid
Tue Aug 06, 2019 8:25 pm
Forum: Ventity
Topic: Interactive and Dynamic Cohorts
Replies: 2
Views: 133

Re: Interactive and Dynamic Cohorts

There are several ways to do this, depending on how large a vector of vehicle types you need. Here are two: VehicleCohorts.zip In #1, each cohort includes separate stocks of EVs and ICEs. This is pretty simple. In #2, the idea of the "fleet" is generalized so that the total market includes separate ...
by tomfid
Tue Aug 06, 2019 6:36 pm
Forum: Ventity
Topic: sensitivity runs
Replies: 1
Views: 97

Re: sensitivity runs

There isn't - but there should be. I'll put in a feature request ticket.
by tomfid
Tue Aug 06, 2019 1:39 pm
Forum: Vensim
Topic: BUG: Graphs not have same scaling b/t mac and win
Replies: 5
Views: 139

Re: BUG: Graphs not have same scaling b/t mac and win

There's that, but there are also some options on the scaling tab of the control panel.
by tomfid
Tue Aug 06, 2019 1:39 am
Forum: Vensim
Topic: BUG: Graphs not have same scaling b/t mac and win
Replies: 5
Views: 139

Re: BUG: Graphs not have same scaling b/t mac and win

That could be a graph settings issues - there are settings for tight and loose scaling and inclusion of 0. Yours might not match theirs.
by tomfid
Mon Aug 05, 2019 10:41 pm
Forum: Vensim
Topic: Input data excel import
Replies: 4
Views: 110

Re: Input data excel import

Actually, you might only need Pro.
by tomfid
Mon Aug 05, 2019 9:51 pm
Forum: Vensim
Topic: BUG: Graph legends include the file extension but shouldn't
Replies: 2
Views: 81

Re: BUG: Graph legends include the file extension but shouldn't

This may be necessary for situations where users have new and old datasets in the same location.

Perhaps the rule for x64 should be that the extension is omitted for the native vdfx, and shown only for the legacy vdf.
by tomfid
Wed Jul 31, 2019 5:20 pm
Forum: Vensim
Topic: Delay function
Replies: 3
Views: 132

Re: Delay function

by tomfid
Tue Jul 30, 2019 5:37 pm
Forum: Ventity
Topic: GIS function
Replies: 8
Views: 328

Re: GIS function

The issue seems to be the projection - MGI/Austria Lambert. I reprojected the file to WGS84 in qgis, and the result works.
by tomfid
Mon Jul 29, 2019 5:48 pm
Forum: Vensim
Topic: How to run sensitivity simulations with Vensim DLL
Replies: 3
Views: 134

Re: How to run sensitivity simulations with Vensim DLL

The most likely candidate is a filename mismatch, or file in wrong directory.

Usually the easiest thing is to prototype your commands as a command script.

RUNNAME controls the run name, same as for ordinary simulations.
by tomfid
Mon Jul 29, 2019 4:34 pm
Forum: Vensim
Topic: Problem with the random uniform generator
Replies: 4
Views: 174

Re: Problem with the random uniform generator

Forgot the attachment:
test3arr.mdl
(10.24 KiB) Downloaded 10 times
by tomfid
Mon Jul 29, 2019 4:33 pm
Forum: Vensim
Topic: Problem with the random uniform generator
Replies: 4
Views: 174

Re: Problem with the random uniform generator

I'm not convinced that there's a problem. I used the attached modified model to run a sample of 1000 realizations at once, and looked at the statistics for the cumulated "input". The expected value of the standard deviation of "input" given by the binomial distribution is sqrt(100000*0.2*(1-0.2))=12...
by tomfid
Thu Jul 25, 2019 2:03 pm
Forum: Ventity
Topic: GIS function
Replies: 8
Views: 328

Re: GIS function

I think you've found an aspect that's not implemented yet - plotting entities that don't exist at time 0. Hopefully this will be done soon as we need it too. It'll be in 3.0.x and we can give you access to a nightly build when it's ready.

Do you have an example for the blank-screen problem?
by tomfid
Thu Jul 25, 2019 12:48 pm
Forum: Vensim
Topic: Passing data between models
Replies: 4
Views: 177

Re: Passing data between models

I'm not sure your users would need to do anything. When you run model A, the generation of a dataset is automatic. Similarly, when you run model B, it'll read the dataset specified on the Advanced tab without any intervention. Two things could go wrong I guess: - a file collision if there's a concur...
by tomfid
Wed Jul 24, 2019 1:22 pm
Forum: Ventity
Topic: GIS function
Replies: 8
Views: 328

Re: GIS function

1) I assume the correct result would be for Italy to become blue at time 5. Not sure what's happening - I just ran a quick test that I think is similar and it worked. What's the time scale in the Run Control in your sample model? Can you post a copy (.zip the whole model folder, including shapefiles...
by tomfid
Wed Jul 24, 2019 1:16 pm
Forum: Vensim
Topic: Somebody help me please!! ramp and pulse train combination
Replies: 24
Views: 1879

Re: Somebody help me please!! ramp and pulse train combination

Here's a simple structure that generates pulses. There are a couple limitations - width=TIME STEP, and it wouldn't work with RK4 integration. I'm guessing it would work for your case though.
PULSE TRAIN alternative 1.mdl
(2.02 KiB) Downloaded 12 times
by tomfid
Tue Jul 23, 2019 12:47 pm
Forum: Vensim
Topic: Can you help me with multiple allocation?
Replies: 5
Views: 171

Re: Can you help me with multiple allocation?

There's a chapter on the allocation function assumptions and constraints here: https://www.vensim.com/documentation/allocation_overview.htm It might be possible to do something more complex using FIND ZERO if needed. It's also possible to do allocation using the optimizer, though not very practical ...
by tomfid
Mon Jul 22, 2019 11:53 pm
Forum: Ventity
Topic: GIS function
Replies: 8
Views: 328

Re: GIS function

There's some info in the Help system under Examining Results>Visualizer. A video is also in the pipeline.
by tomfid
Mon Jul 22, 2019 11:52 pm
Forum: Vensim
Topic: Can you help me with multiple allocation?
Replies: 5
Views: 171

Re: Can you help me with multiple allocation?

Enforcing limits on the allocation is exactly what the function does. The price is really just a priority for the allocation process within those constraints. The solution to the alloc function is optimal if you interpret the priority distribution for each supplier/demander as a cost or utility func...
by tomfid
Mon Jul 22, 2019 1:05 pm
Forum: Vensim
Topic: Can you help me with multiple allocation?
Replies: 5
Views: 171

Re: Can you help me with multiple allocation?

You want DEMAND AT PRICE, SUPPLY AT PRICE and FIND MARKET PRICE. See the sample model in the Help system. https://www.vensim.com/documentation/fn_allocations.htm
by tomfid
Sun Jul 21, 2019 7:02 pm
Forum: Ventity
Topic: Videos
Replies: 2
Views: 1852

Re: Videos

The latest covers the Vensim import feature:

https://ventity.biz/vensim-import/
by tomfid
Sun Jul 21, 2019 6:59 pm
Forum: Ventity
Topic: Ventity 3.0 Released
Replies: 0
Views: 139

Ventity 3.0 Released

by tomfid
Sun Jul 21, 2019 6:58 pm
Forum: Ventity
Topic: Sharing Ventity Models
Replies: 1
Views: 354

Re: Sharing Ventity Models

There are 3 options at present:
- Use evaluation versions or full licenses for the trial users
- Deploy the model on Forio.com
- Deploy the model on your own servers with our Windows Service component (contact us for details).
by tomfid
Sat Jul 20, 2019 8:52 pm
Forum: Vensim
Topic: Somebody help me please!! ramp and pulse train combination
Replies: 24
Views: 1879

Re: Somebody help me please!! ramp and pulse train combination

A possible workaround would be to create a macro that implements a pulse train.