% -*- texinfo -*-
% @deftypefn {Function File} {@var{yi} =} ppval (@var{pp}, @var{xi})
% Evaluate piece-wise polynomial @var{pp} at the points @var{xi}.
% If @code{@var{pp}.d} is a scalar greater than 1, or an array,
% then the returned value @var{yi} will be an array that is
% @code{d1, d1, @dots{}, dk, length (@var{xi})]}.
% @seealso{mkpp, unmkpp, spline}
% @end deftypefn