[Octave-bug-tracker] [bug #48982] line drawing not compatible with gnuplot version 4.4.0

[Rik]

Follow-up Comment #1, bug #48982 (project octave):

Probably have to step through the code with the debugger.  According the the
information in __gnuplot_has_feature__, 'linetype' should be used only for 4.6
and above.  

In __gnuplot_draw_axes__ I see lots of constructs like this


if (__gnuplot_has_feature__ ("linetype"))
  scmd = "linetype";
else
  scmd = "linestyle";
endif


I suppose it's possible that somewhere an instance of this was missed and it
needs something like that above.

The other possibility is that the gnuplot_linetype routine is wrong.


function [lt] = gnuplot_linetype (obj)

  if (isfield (obj, "linestyle"))
    if (__gnuplot_has_feature__ ("dashtype"))
      opt = "dashtype";
      switch (obj.linestyle)
        case "-"
          lt = "solid";
        case "--"
          lt = "'_ '";
        case ":"
          lt = "'. '";
        case "-."
          lt = "'-. '";
        case "none"
          lt = "";
        otherwise
          lt = "";
      endswitch
    elseif (__gnuplot_has_feature__ ("linetype"))
      opt = "linetype";
      switch (obj.linestyle)
        case "-"
          lt = "1";
        case "--"
          lt = "2";
        case ":"
          lt = "3";
        case "-."
          lt = "6";
        case "none"
          lt = "";
        otherwise
          lt = "";
      endswitch
    else
      lt = "";
    endif
    if (! isempty (lt))
      lt = sprintf ("%s %s", opt, lt);
    endif
  else
    lt = "";
  endif


"dashtype" is available only with 5.0.  "linetype" is available only with 4.6
and above.  For gnuplot 4.4, both of these would be false and linetype (lt)
would be set to "".



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