Search found 26 matches

by Quame
Wed Jun 05, 2019 11:19 am
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

Good to know. Thanks for your assistance
by Quame
Tue Jun 04, 2019 9:07 pm
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

This works great for batching, except all subset simulations start from 1 to the end specified. Just wondering if there is a way to serially do the runs: say first subset = run 1- run 500, second subset = run 501- run 1000 etc, using the .vsc file. Thanks
by Quame
Tue Jun 04, 2019 4:57 am
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

Okay, greatly appreciate it. I will try that. Thanks,
by Quame
Mon Jun 03, 2019 11:58 pm
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

I have gone through the manual trying to implement Monte Carlo in a batch mode. In a normal Vensim Monte Carlo simulation, after specifying the range (min-max) values for parameters of interest, the model automatically samples from this space during each run. Now in a batch mode using the command sc...
by Quame
Mon Jun 03, 2019 4:12 pm
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

Thanks a lot. I will look into the scripting for running in a batch mode then. Kind regards
by Quame
Mon Jun 03, 2019 3:55 pm
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Re: Sensitivity run

I am running a huge number of simulations and wanted to view the results, say on another computer before the simulation ends.
by Quame
Mon Jun 03, 2019 4:24 am
Forum: Vensim
Topic: Sensitivity run
Replies: 9
Views: 4257

Sensitivity run

Dear All,

Is there a way to view sensitivity run results while model is running? Also,is it possible to run Vensim Monte Carlo simulation in a batch mode?

Thanks
by Quame
Sat Jun 01, 2019 4:56 pm
Forum: Vensim
Topic: Importing time series data from a textfile
Replies: 5
Views: 2806

Re: Importing time series data from a textfile

Okay thanks
by Quame
Fri May 31, 2019 11:00 pm
Forum: Vensim
Topic: Importing time series data from a textfile
Replies: 5
Views: 2806

Re: Importing time series data from a textfile

Okay thanks for the reply. I tried that, but the issue I had was with respect to the arguments. The function has the arguments "GET DIRECT DATA( {'filename'} , {'tabname'} , {'time_row_or_col'} , {'first_data_cell'} )". In the text file, how do I reference ,tabname, time row or col, and fi...
by Quame
Fri May 31, 2019 8:46 pm
Forum: Vensim
Topic: Importing time series data from a textfile
Replies: 5
Views: 2806

Importing time series data from a textfile

Dear All, I have a number of time series data in a text file that I want to use to drive my model model. My plan had been to import the data and create a vdf file from which I would use the 'GET VDF DATA' function to get the data. I am forced to import from a text file because Excel cannot be instal...
by Quame
Mon Mar 25, 2019 5:53 pm
Forum: Vensim
Topic: Giving Excel Data
Replies: 7
Views: 3584

Re: Giving Excel Data

Okay thanks a lot
by Quame
Fri Mar 22, 2019 1:14 am
Forum: Vensim
Topic: I plot the chart but the line does not appear
Replies: 9
Views: 4012

Re: I plot the chart but the line does not appear

Let VENSIM read the numbers rather than the dates
by Quame
Fri Mar 22, 2019 1:11 am
Forum: Vensim
Topic: I plot the chart but the line does not appear
Replies: 9
Views: 4012

Re: I plot the chart but the line does not appear

If you are using GET DATA function to import the time series data, then this is the cause. VENSIM does not recognize excel dates. A way I found around this is: in the model settings select a base date (when time =0) to correspond to a date prior to the first date in your excel. Then number the dates...
by Quame
Fri Mar 22, 2019 12:24 am
Forum: Vensim
Topic: I plot the chart but the line does not appear
Replies: 9
Views: 4012

Re: I plot the chart but the line does not appear

Are you reading any time series data from excel?
by Quame
Thu Mar 21, 2019 5:19 pm
Forum: Vensim
Topic: Giving Excel Data
Replies: 7
Views: 3584

Re: Giving Excel Data

The model time is in Model>Settings>Time Bounds The data time horizon will be in your spreadsheet. Model and data time units have to match. Excel dates generally won't work, because internally they are a number representing the days elapsed since Jan 1 1900. Thanks tomfid. I am having similar issue...
by Quame
Wed Mar 20, 2019 8:39 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Thanks a lot tomfid, I tried and works just fine. I really appreciate.
Kind regards
by Quame
Wed Mar 20, 2019 4:57 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Okay thanks
by Quame
Wed Mar 20, 2019 4:20 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

The fact that these subscripts are all the same size suggests to me that you really just need a single dimension: Catchment : (c1-c2222) or something like that. As is, if you write variable[ManureN,FertN] it will have over 4 million elements, which can be done, but quickly bogs things down. So, I t...
by Quame
Wed Mar 20, 2019 4:07 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Okay, so please how do I use the equivalence relations for the subscript?
by Quame
Wed Mar 20, 2019 2:26 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Thanks a lot tomfid, I think that would work, I will try it and let you know.
by Quame
Wed Mar 20, 2019 10:30 am
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Okay thanks. The model estimates nutrient exported from agricultural catchment. These nutrients are total nitrogen (TN and TP) highlighted yellow in the model. The model uses catchment properties such as fertilizer applied to the farm, manure from cattle, soil permeability, catchment slope, stream l...
by Quame
Wed Mar 20, 2019 5:04 am
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Please find attached the model
by Quame
Wed Mar 20, 2019 5:00 am
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Would be glad if I could attach the model, but basically, the 13 subscripts represent landscape processes for about 2000 plus land units
by Quame
Wed Mar 20, 2019 2:19 am
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Re: Using fewer subscripts

Thanks tomfid for the reply. My main output variable actually has about 13 variables.
by Quame
Tue Mar 19, 2019 11:31 pm
Forum: Vensim
Topic: Using fewer subscripts
Replies: 18
Views: 6605

Using fewer subscripts

Please I am trying to modify an existing model in VENSIM DSS which initially had subcatchment (upto about 2000 plus) processes modelled using lookup tables and time function. I want to use subscripts instead as I want to utilize the time function for dynamic processes within the model. I realized th...