title: How do I obtain the frequencies of each value in an FFT?
body: <p>I have an FFT result. These are stored in two <code>double</code> arrays: a real part array and an imaginary part array. How do I determine the frequencies that correspond to each element in these arrays?</p>
  
  <p>In other words, I would like have create an array that stores the frequencies for each real and imaginary component of my FFT.</p>