Function: middlepad

MIDDLEPAD  Symmetrically zero-extends or cuts a function
  Usage:  h=middlepad(f,L);
          h=middlepad(f,L,dim);
          h=middlepad(f,L,...);

  MIDDLEPAD(f,L) cuts or zero-extends f to length L by inserting
  zeros in the middle of the vector, or by cutting in the middle
  of the vector.

  If f is whole-point even, MIDDLEPAD(f,L) will also be whole-point
  even.

  MIDDLEPAD(f,L,dim) does the same along dimension dim.
  
  If f has even length, then f will not be purely zero-extended, but
  the last element will be repeated once and multiplied by 1/2.
  That is, the support of f will increase by one!

  Adding the flag 'wp' as the last argument will cut or extend whole point
  even functions.  Adding 'hp' will do the same for half point even
  functions.

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

See also: isevenfunction, fir2long, fftresample.

Package: ltfat