title: How to compute frequency of data using FFT?
body: <p>I want to know the frequency of data.  I had a little bit idea that it can be done using FFT, but I am not sure how to do it.  Once I passed the entire data to FFT, then it is giving me 2 peaks, but how can I get the frequency?</p>
  
  <p>Thanks a lot in advance.</p>