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fft_serial_test():
  MATLAB/Octave version 6.4.0
  Test fft_serial()
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fft_serial():
  MATLAB/Octave version 6.4.0
  Demonstrate an implementation of the Fast Fourier Transform
  of a complex data vector.

  Accuracy check:

    FFT ( FFT ( X(1:N) ) ) == N * X(1:N)

             N      NITS    Error         Time          Time/Call     MFLOPS

             2     10000  0.000000e+00  1.447232e+00  7.236160e-05  1.381948e-01
             4     10000  6.938894e-17  4.113182e+00  2.056591e-04  1.944966e-01
             8     10000  6.206335e-17  9.660798e+00  4.830399e-04  2.484267e-01
            16     10000  9.007208e-17  2.298150e+01  1.149075e-03  2.784849e-01
            32      1000  1.304161e-16  5.329769e+00  2.664885e-03  3.002006e-01
            64      1000  1.827727e-16  1.223043e+01  6.115216e-03  3.139709e-01
           128      1000  1.992290e-16  2.776272e+01  1.388136e-02  3.227350e-01
           256      1000  1.879415e-16  6.234191e+01  3.117096e-02  3.285109e-01

FFT_SERIAL:
  Normal end of execution.

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fft_serial_test():
  Normal end of execution.

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