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How to calculate frequency from captured array?

I have captured an array from the O'scope and I want to calculate the frequency on the subarray of the captured array. How can I do that?
 
Thank you,
Hiren
Hiren Patel
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LV has FFT functions to get frequency components from a waveform.  I think there are examples of such an application.
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA
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