Giving time series data
Giving time series data
I have given time series data as input to my variables. The data is annual in nature. I have set the time step to year in initial settings of the model. However when I am trying to plot the variable it is observed that the values are plotted with an interval of one month. How to rectify it?
Re: Giving time series data
You probably just need to change the unit for Time in Model>Settings>Time Bounds.
After you've done that, you should define and check all your other units.
After you've done that, you should define and check all your other units.
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Re: Giving time series data
Can you post the model & data, or a screenshot of a sample of each?
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Re: Giving time series data
I am attaching model, excel data and graph of one of the variable.
 Attachments

 potential_gwr.xlsx
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 well water data.png (6.33 KiB) Viewed 1093 times

 Vensim.pdf
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Re: Giving time series data
The Year column in your spreadsheet is not numeric, it's text. I'm not sure what Vensim is assuming about the time axis, because you haven't provided the equations or imported .vdf, but I'm guessing that if you fix the timing it will work.
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Re: Giving time series data
I am unable to understand how to use the imported data in writing equations involving time series. Can you please help me with it. I know this is very small thing to ask for, but as I am new to Vensim it is talking me a lot of time to figure out.
Re: Giving time series data
This might be a good place to start: http://vensim.com/documentation/usr16.htm
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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.
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.
Re: Giving time series data
Vensim will be looking for time formatted as a decimal year.
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Re: Giving time series data
If your model runs in years, then input it as yearly data if you can as otherwise things can get confusing.
Advice to posters seeking help (it really helps us to help you)
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Units are important!
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http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391
Units are important!
http://www.bbc.co.uk/news/magazine27509559
Re: Giving time series data
Are you talking about the units or granularity of the data? Generally it's always better to use the finest time scale you can, given the time step of the model.
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