Function: demo_nextfastfft

DEMO_NEXTFASTFFT  Next fast FFT number

  This demo shows the behaviour of the NEXTFASTFFT function.

  Figure 1: Benchmark of the FFT routine

     The figure shows the sizes returned by the NEXTFASTFFT function
     compared to using nextpow2. As can be seen, the NEXTFASTFFT
     approach gives FFT sizes that are much closer to the input size.

  Figure 2: Efficiency of the table

     The figure show the highest output/input ratio for varying input
     sizes. As can be seen, the efficiency is better for larger input
     values, where the output size is at most a few percent larger than
     the input size.

Url: http://ltfat.github.io/doc/demos/demo_nextfastfft.html

See also: nextfastfft.

Package: ltfat