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How do get dominant amplitude and frequency value quickly from spectra measurement

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Refer attached vi. Fine, from the graph I can see that the dominant amplitude is 3 with dominant frequency of 100hz. But how do I get that 3 and 100 value out from the waveform data into a double variable? 

 

I am thinking of getting the waveform array output from spectra measurement vi and then do some math on it maybe high percentile or something, but that's clunky! Is there some special function that can get the dominant amplitude and frequency value quickly?

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Accepted by topic author sunflower2772

O! blind me! Use array max and index. Solved already! Smiley Happy

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