doc: Use newer coding conventions in examples/code directory. * FIRfilter.m, FIRfilter_aggregation.m, display.m, subsasgn.m, subsref.m, display.m, end.m, get.m, numel.m, plot.m, polynomial.m, polynomial_superiorto.m, polyval.m, roots.m, set.m, subsasgn.m, subsref.m, celldemo.cc, fortrandemo.cc, funcdemo.cc, globaldemo.cc, oct_demo.cc, paramdemo.cc, stringdemo.cc: Use newer coding conventions in examples/code directory.

function h = plot (p, varargin)

  n = 128;
  rmax = max (abs (roots (p.poly)));
  x = [0 : (n - 1)] / (n - 1) * 2.2 * rmax - 1.1 * rmax;
  if (nargout > 0)
    h = plot (x, p(x), varargin{:});
  else
    plot (x, p(x), varargin{:});
  endif

endfunction