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Can we get the same result from between partial FFT?

Can we get the same result from between partial FFT?
  1. What is the main advantage of FFT?
  2. How do you read a FFT graph?

What is the main advantage of FFT?

The main advantage of an FFT is speed, which it gets by decreasing the number of calculations needed to analyze a waveform.

How do you read a FFT graph?

FFTs of complex vibrations have multiple peaks- one for each frequency present in the vibration. Low frequency peaks are shown at the left end of the graph. The left-most peak represents the fundamental. Other peaks indicate overtones.

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