Amplitude measurements of peaks

[phy3pa]

How do you measure the amplitude of individual peaks in LabView?

[lmtis]

The VI shown in the attachment will give peak location and amplitude, but often it gives the wrong amplitude.  I usually just take the location that it gives and find the amplitude of the location in the array.

[phy3pa]

I've tried using this vi and others (see attached along with data) and they all give me conflicting/wrong results.  I want to measure the amplitude of a series of peaks, where the amplitude for each peak is different.

[lmtis]

You need to give the peak detect a width and threshold.  Try 10 and 1.5 respectively.

[lmtis]

Correction.    Try width of 30, threshold of 2.

[andre.buurman@carya]

The same as you do with every other tool (including pen and paper), using math.

[phy3pa]

Thanks for the help lmtis, much appreciated.