Search found 20 matches

by JudeChen
Mon Nov 25, 2019 5:40 am
Forum: Vensim
Topic: A question about Allocate available function
Replies: 2
Views: 27

Re: A question about Allocate available function

This attached model would mimic what you are say you want to achieve. There is a lot more that goes into modelling the electricity market. Good luck! Do note that this is a quick job so I didnt align the units. Reading the documentation and what others have posted before about these functions are ve...
by JudeChen
Mon Nov 18, 2019 11:39 pm
Forum: Vensim
Topic: how to save the sensitivity graphs as table?
Replies: 15
Views: 1333

Re: how to save the sensitivity graphs as table?

Oh nvm, just realized Vensim represents the graphs based on percentiles, which makes sense! Thanks!

Curious question, is it possible for me to buy a CD of the software and install it in a non-internet connected computer?
by JudeChen
Mon Nov 18, 2019 11:09 pm
Forum: Vensim
Topic: how to save the sensitivity graphs as table?
Replies: 15
Views: 1333

Re: how to save the sensitivity graphs as table?

Hi I would like to check that the confidence bounds used within the Sensitivity graph refers to the number of graphs that fall within the bound right? It does not refer to the confidence intervals used in statistical analysis right? Or am I missing some statistical knowledge that I should know here?...
by JudeChen
Mon Nov 11, 2019 8:56 pm
Forum: Vensim
Topic: Possible Bug: Missing palette when running on external monitor
Replies: 0
Views: 45

Possible Bug: Missing palette when running on external monitor

Hi, Not sure if it is a real bug or a settings problem. When I run VensimDSS on a separate window from my macbook laptop, I am unable to see the palette color choices when I click on the "set color on selected vars" button right at the bottom and VensimDSS just freezes up. I would need to switch to ...
by JudeChen
Thu Nov 07, 2019 3:27 pm
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Tom,

Thank you very much for the clarifications!
by JudeChen
Thu Nov 07, 2019 2:35 am
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Tom, thanks for the guidance. It was really useful. I just tested it. Seems like for a dynamic input to supply curves priority would require a dynamic input to the demand curve priority. It did not occur to me that such a setup is required as I only had a single demander. I tried using a dynamic val...
by JudeChen
Thu Nov 07, 2019 1:28 am
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

I see. Thanks for the pointer! So in order to generate a proper Supply at Price, the following things are important: 1) Supply at Price requires Market Clearing Priority as input. 2) ppriority of demand and supply curves should be in the same order of magnitude. 3) pwidth of demand and supply curves...
by JudeChen
Tue Nov 05, 2019 6:33 pm
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Oh yes, sorry about that. Forgot to upload the data file as well.
by JudeChen
Tue Nov 05, 2019 1:22 am
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

I am not sure if I am doing it right but the amount supplied variable that I am getting is not showing what I would be expecting, where its total is supposed to be input demand. Since the input demand should match amount supplied in the scenario, where there is clearly a case where there is an exces...
by JudeChen
Mon Nov 04, 2019 7:48 pm
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Hi,

Thanks for the information. I have attached my model for discussion here. The Find Market Price portion can be found in the Pricing view.

Thank you!!
by JudeChen
Mon Nov 04, 2019 2:13 am
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Thank you! i did manage to get it to work, there was upstream information that required an initial value for it to work. I was wondering who can I can email my model to if I have further queries? The issue i am facing is that the SUPPLY AT PRICE function seems to not work quite right and I am not su...
by JudeChen
Sat Nov 02, 2019 8:06 pm
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Hello! I was trying to use the FIND MARKET PRICE feature to model the market clearing price for the electricity market. I got the following errors: ALLOCATE_AVAILABLE/FIND_MARKET_PRICE = bad ptype error. Floating point error computing - Market Clearing Priority - at time = 2010.0000 So the formula I...
by JudeChen
Tue Oct 29, 2019 8:38 pm
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Re: Allocation by Priority and Demand Values

Oh nvm. Figured it out the issue. Thanks for creating the allocation by priority feature. Useful!
by JudeChen
Tue Oct 29, 2019 4:19 am
Forum: Vensim
Topic: Allocation by Priority and Demand Values
Replies: 20
Views: 335

Allocation by Priority and Demand Values

Hi, I am trying to model an energy investment process here where a proportion of GDP is allocated to investments in energy generating capacities. I was trying to use the Allocation by Priority function to portion the amount of GDP which requires a demand value. Using the basis of Stock Management St...
by JudeChen
Mon Oct 28, 2019 11:34 pm
Forum: Vensim
Topic: How to deal with the warnings in Vensim
Replies: 5
Views: 3030

Re: How to deal with the warnings in Vensim

I see. Thanks!

Found it in the VensimDSS > Options > Settings tab. The Tools tab only showed Analysis Toolset, Sketch Toolset, Language, Convert Charset
by JudeChen
Mon Oct 28, 2019 10:45 pm
Forum: Vensim
Topic: How to deal with the warnings in Vensim
Replies: 5
Views: 3030

Re: How to deal with the warnings in Vensim

Hi, I was wondering if the suppression option is available for VensimDSS in Mac?
by JudeChen
Thu Oct 10, 2019 1:29 am
Forum: Vensim
Topic: Giving time series data
Replies: 12
Views: 1179

Re: Giving time series data

tomfid wrote:
Wed Oct 09, 2019 5:22 pm
Vensim will be looking for time formatted as a decimal year.
Okay. thanks! So should i input the info as based on monthly or yearly data?
by JudeChen
Wed Oct 09, 2019 4:05 pm
Forum: Vensim
Topic: Giving time series data
Replies: 12
Views: 1179

Re: Giving time series data

Hi,

If my Units for Time is set at Yearly, and my Time Step is at 0.0625, does Vensim read XLS data for time in the monthly or yearly manner here?

I am currently using the VensimDSS (S/N 9510), academic use license although it says VensimPLE on my profile.
by JudeChen
Fri Jul 05, 2019 3:17 pm
Forum: Vensim
Topic: Creating Groups in VensimPLE
Replies: 3
Views: 215

Re: Creating Groups in VensimPLE

Hi!

Thanks for your reply. I realise what I might need actually is subscripting rather that groups, which is only found in the professional version right?
by JudeChen
Thu Jul 04, 2019 8:25 am
Forum: Vensim
Topic: Creating Groups in VensimPLE
Replies: 3
Views: 215

Creating Groups in VensimPLE

Hi all, I tried to create groups in VensimPLE but it does not seem to work for me. Did anyone else face this issue before? For example, I have two stocks, Nuclear Power and Natural Gas which I want to classify them into the group of Capacity. Does not work when I tried to create the Capacity group i...