FFT question

[labmaster]

Dear,

I have never used FFT function to identify some frequency of the data.

The attached data should be shown in 1 Hz or 0.5 Hz. (not identified easily after transforming in my eyes.)

If you open my vi, you can find the original data and transformed result.

Would you please check my simple code? Am I right?

*) I got to know there are so many FFT functions in example code and I found only one vi can be applied to my code.

What's the difference among them?

[Xaq]

Labmaster-

My suggestion would be to use the FFT Spectrum (Mag and Phase) VI to find a simple FFT. It takes a waveform as an input and returns a magnitude and phase waveform. Here's  a different rendition of your code using the same min/max filter you had in place.

Xaq
Applications Engineer
National Instruments

[labmaster]

Dear,

Thank you for the reply.

I have already used the function, but as you can see, there is no different thing when I used my function.

Thank you.

Lee