"As Date" question

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billh
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Posts: 45
Joined: Tue Jan 10, 2017 11:48 pm
Vensim version: DSS

"As Date" question

Post by billh »

I've got a model that has units for time set to hour and has the pertinent information in the Date Display boxes of the Time Bounds tab of the Model Settings window: Date, YYYY-MM-DD, 2016, 10, 1, Hour.

On the Control Panel Time Axis tab, I've checked the "As Date" checkbox.

My graphs have 0000-00-00 as the date label for each marked point on the abscissa.

If I uncheck "As Date", I get the appropriate value of hours along the abscissa.

If I set the Base date units to Day, I get dates in the proper format, but they appear to be calling each hour a new day--the end of the simulation is now shown in 2031 instead of 2017.

Am I doing something wrong? Do I need to figure out how to create a new time base?
Administrator
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Joined: Wed Mar 05, 2003 3:10 am

Re: "As Date" question

Post by Administrator »

I think the documentation needs improvement on this. Go to Model->Settings, here you can set the date display settings, you should be able to change these to fix the display.
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http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391

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billh
Member
Posts: 45
Joined: Tue Jan 10, 2017 11:48 pm
Vensim version: DSS

Re: "As Date" question

Post by billh »

That sounds reasonable, but I'm not sure what else to try.

On the left side, I've got an initial time of 0, a final time of 5831 (yes, it's the same long model I wrote about recently), and time step is 0.125. SAVEPER is 1, units for time is hour, and I've currently selected Euler integration.

I think that's all essential for the model as I want it to work.

On the top right, I've got (in order) Date and YYYY-MM-DD. That sounds like what I want.

That leaves the base date. I want this to start at the beginning of a "water year," which is October 1, so I did that.

The remaining choice is base date units.

If I select Day, I get dates from 2016-10-01 through 2030-11-02, suggesting it's taking the numeric hour as a numeric day.

If I select Hour, I get dates from 0000-00-00 through 0000-00-00.

That's all with "As Date" selected on the Time Axis of the Control Panel. If I uncheck that, I get the expected number of hours on graphs.

What am I missing?
Administrator
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Posts: 4573
Joined: Wed Mar 05, 2003 3:10 am

Re: "As Date" question

Post by Administrator »

Can you email the model to us so we can take a look? It could be a bug, might also be some incompatible settings.
Advice to posters seeking help (it really helps us to help you)
http://www.ventanasystems.co.uk/forum/v ... f=2&t=4391

Units are important!
http://www.bbc.co.uk/news/magazine-27509559
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