title: FFT of large data (16gB) using Matlab
body: <p>I am trying to compute a fast fourier transform of a large chunk of data imported from a text file which is around 16 gB in size. I was trying to think of a way to compute its fft in matlab, but due to my computer memory (8gB) it is giving me an out of memory error. I tried using memmap, textscan, but was not able to apply to get FFT of the combined data.</p>
  <p>Can anyone kindly guide me as to how should I approach to get the fourier transform? I am also trying to get the fourier transform (using definition) using C++ code on a remote server, but it's taking a long time to execute. Can anyone give me a proper insight as to how should I handle this large data?</p>