view examples/funcdemo.cc @ 17481:576cf0589c6d

Overhaul contour labeling functions. * scripts/plot/clabel.m: Use 'h', rather than 'retval', to match variables to documentation. Improve performance of input processing by using try/catch block and eliminating for loops. * scripts/plot/private/__clabel__.m: Get X and Y spacing in points from axis rather than assuming 4"x3" plot figure. Fix incorrect determination of axis limits if no contour handle provided. Rename loop vars i1, j1 to i,j. Performance improvement by using bsxfun over repmat. Use find to replace while loop (slow). Keep label rotation in the range [-90, 90] for readability.
author Rik <rik@octave.org>
date Tue, 24 Sep 2013 13:16:50 -0700
parents be41c30bcb44
children
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#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;
}