% -*- texinfo -*-
% @deftypefn {Function File} {} spectral_xdf (@var{x}, @var{win}, @var{b})
% Return the spectral density estimator given a data vector @var{x},
% window name @var{win}, and bandwidth, @var{b}.
%
% The window name, e.g., @code{'triangle'} or @code{'rectangle'} is
% used to search for a function called @code{@var{win}_sw}.
%
% If @var{win} is omitted, the triangle window is used. If @var{b} is
% omitted, @code{1 / sqrt (length (@var{x}))} is used.
% @end deftypefn