Function: prect

PRECT   Periodic rectangle
  Usage:  f=prect(L,n);

  psinc(L,n) computes the periodic rectangle (or square) function of
  length L supported on n samples. The DFT of the periodic
  rectangle function in the periodic sinc function, PSINC.

   If n is odd, the output will be supported on exactly n samples
    centered around the first sample.

   If n is even, the output will be supported on exactly n+1 samples
    centered around the first sample. The function value on the two
    samples on the edge of the function will have half the magnitude of
    the other samples.

  Examples:
  ---------

  This figure displays an odd length periodic rectangle:

    stem(prect(30,11));
    ylim([-.2 1.2]);

  This figure displays an even length periodic rectangle. Notice the
  border points:

    stem(prect(30,12));
    ylim([-.2 1.2]);

Url: http://ltfat.github.io/doc/fourier/prect.html

See also: psinc.

Package: ltfat