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How to display historical data on graphic panel

Does anyone know how to display a historical data on the graphic panel? For example I want to have measured value of tank level for each hour of the day displayed in separate fields on graphic panel.
There is possibility for using data from citadel or using spreadsheet object to log data every hour to csv file. But how can I get the data from citadel or csv files and display it on the graphic panel?  
Albert
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There is an example in the Dev Zone.
It uses a graph/chart to display the data, just take the values and put them into expressions or pots.

this is may be it: http://zone.ni.com/devzone/cda/epd/p/id/4225

Mike


Message Edited by Mike@DTSI on 07-11-2008 12:04 PM
Mike Crabtree - Lead Developer
Destek of Nevada, Inc. / Digital Telemetry Systems, Inc.
(866) 964-6948 / (760) 247-9512
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You can also use the sample object to do this. Use a timer to trigger the sample, then display 24 of the sample objects data values ie sample.1, sample.2, ....sample.24.  I often use this to display a months worth of daily flow values.

Jim
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