How to display 4 graphs on the same graphs display when running the VI 4 times ?

My goal is trying to display 4 different graphs on the the same XY graph when I run the VI 4 times. Right now, the new graph will overdrive the previous graph when I re-run the VI.
Please help!
Solved!
Go to Solution.

You need a mechanism for storing previous data; LabVIEW graphs do not have a history, they display sets of data. A shift register is an obvious answer, but it can get somewhat "tricky" when the Build XY Graph is used as it accepts a DDT and you cannot simply append a data set using array functions...
The solution?
Rather than make the changes for you, I've created a simple example for a regular graph to show you how to use an un-initialized shift register to store values from previous runs (the data will be lost when the VI is closed) as long as the VI is in memory.
I'll leave the DDT conversion from the 2D-array and XY graph implementation for you to figure out in case this is some form of a homework assignment.
Good luck!
-Bob
Message Edited by B O B on 11-20-2009 04:53 PM
-Bob
Attachments:
Example 2.vi ‏12 KB

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