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Compare the Model's Behavior to Historical Data
Posted: Wed Sep 23, 2009 2:31 am
by lynchyml
hello everyone!
The time range of historical data is 2000-2006, but the graph show all the values from 2000-2020.
thank you very much!
Posted: Wed Sep 23, 2009 10:38 am
by bob@vensim.com
Use the Time Axis tab of the control panel to set the time range to view of set it directly in custom graph definitions.
Posted: Thu Sep 24, 2009 2:59 am
by lynchyml
thank you for your reply.
After reading chapter12 and 13, I know there are two methods to select a time range:
first: time axis tab of the controp panel as you said.
second:drag the mouse.
the problem is :
the two methods will change the time range of all varibles in the graph, but I only have to change one varible's time range.
time range of one varible is 2000-2006
time range of the other varible is 2000-2020
both the varibles will display in one graph
hoping for futher explain
thank you very much!
[Edited on 9-24-2009 by lynchyml]
Posted: Thu Sep 24, 2009 7:41 am
by Administrator
The only way I can think of doing what you want is to have the data for the 2000-2006 variable to be an external data source, and import this to a VDF file (or via Excel).
Posted: Thu Sep 24, 2009 10:41 am
by bob@vensim.com
You should be using Data variables for data, and these will only display the available points so the graph will automatically stop when data are no longer available.
Posted: Fri Sep 25, 2009 2:43 am
by lynchyml
warning:simulation starts before first time for exogenous variable