number of lines of a sinusoid

[EduU]

Well guys, I need to calculate the error of the lines of a sinusoid

Well, you guys know that the plus of all lines in a sinusoid have to be 0

but we never get 0 in this calc, because always have an harmonic distortion

so we always get some "error" at the lines of a sinusoid

and I need to calculate this error, anyone know How can I calc it in LabVIEW?

I have 3 voltages, R S and T

I need to know the mathematical function to calculate it or if have any VI in LabVIEW that measure it!

Thanks

[falkpl]

There are several VIs for measuring harmonic distortion and signal noise.  There are a few in the waveform measurments pallette or there is a sound and vibration toolkit as well.

[Hummer1]

I don't understand the reference to a "line of a sinusoid"...could you explain that a little bit.  I don't know what the "lines" you are referring to ... are you looking at the frequency spectrum and adding them all up and then reproducing a sinusoid with the fourier terms...adding them and expecting them to come to 0?  is that it?