view examples/funcdemo.cc @ 17483:bddb9688e41c

feather.m: Overhaul function for Matlab visual compatibility. * scripts/plot/feather.m: Reduce length of arrowhead size to 0.20 of arrow shaft. Change arrow head angle with shaft from 45 to 30 degrees. Use variable 'h' instead of 'retval' to match documentation. Redo input validation. Add %!error input validation tests.
author Rik <rik@octave.org>
date Tue, 24 Sep 2013 13:17:04 -0700
parents be41c30bcb44
children
line wrap: on
line source

#include <octave/oct.h>
#include <octave/parse.h>

DEFUN_DLD (funcdemo, args, nargout, "Function Demo")
{
  octave_value_list retval;
  int nargin = args.length ();

  if (nargin < 2)
    print_usage ();
  else
    {
      octave_value_list newargs;
      for (octave_idx_type i = nargin - 1; i > 0; i--)
        newargs(i-1) = args(i);
      if (args(0).is_function_handle () || args(0).is_inline_function ())
        {
          octave_function *fcn = args(0).function_value ();
          if (! error_state)
            retval = feval (fcn, newargs, nargout);
        }
      else if (args(0).is_string ())
        {
          std::string fcn = args(0).string_value ();
          if (! error_state)
            retval = feval (fcn, newargs, nargout);
        }
      else
        error ("funcdemo: INPUT must be string, inline, or function handle");
    }
  return retval;
}