How do you reset Waveform chart to blank?

I have a VI with a Waveform chart in the WHILE loop, and each time I STOP the vi and re-start it, the old data remains in the display and moves out only as new data is collected.  This old data persists even after the VI is closed and re-opened.
Is there a way to remove the old data each time the VI is run, in other words to make the blank screen the default for the  Waveform chart?  Right now, every time I open and run the VI, there is a squiggly line in the display, from irrelevant/useless data collected previously, and it would be cleaner and less confusing if there was no old data displayed there.
Thanks,
Dave
Solved!
Go to Solution.

Thanks, but, still confused.  I already have a data source wired to the Waveform graph.  I cannot wire two things to the Waveform graph...so...can you offer more information? See the vi below....Waveform graph allows only one thing to be wired into it....
 Are you suggesting wiring an empty array each time I use the VI and then reconnecting the data source?
Attachments:
waveform graph question.jpg ‏19 KB

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