From: Hidetoshi NAGAI <nagai@...>
Date: 2006-09-29T11:35:42+09:00
Subject: Re: CanvasPlot, createPlotAxis and createLinePlot.

From: Patrick Lynch <lynchnco@patmedia.net>
Subject: Re: CanvasPlot, createPlotAxis and createLinePlot.
Date: Fri, 29 Sep 2006 04:51:28 +0900
Message-ID: <d2a90d32d2bcc2ad4a6a84a6031f05b3@ruby-forum.com>
> I've done that...can you tell me how to add tick marks and coordinate 
> values and possibly even coordinate labels?
> 
> FYI
> 
> 0----10----20----30----40---...
> Label: this is the x-axis...
> 
> a similar thing for the y-axis...

Do you want to use this from Ruby?
                   vvvv
<http://perl.codefetch.com/example/da/mptk-code14/Tk/CanvasPlot.pm> 

It seems that the package is constructed with standard canvas items only.
Why don't you translate it to Ruby/Tk? ;-)
Anyway, translation is not so difficult, if you can read the Perl source. 
For example, 
----<Perl/Tk>--------------------------------------------------
  if ($y_axis) {
     $self->createText(
        $x1-$tl, $y2-$x, -text => $l,
        %args, -fill => $tcolor,
        -font => $lfont, -anchor => $an,
     );
  } else {
     $self->createText(
         $x+$x1, $y1+$tl, -text => $l,
         %args, -fill => $tcolor,
         -font => $tfont, -anchor => $an,
    );
  }
---------------------------------------------------------------
----<Ruby/Tk>--------------------------------------------------
  if (y_axis) {
     TkcText.new(self, x1-tl, y2-x, 
                 args.merge(:text=>l, :fill=>tcolor,
                            :font=>lfont, :anchor=>an)
                )
  } else {
     TkcText.new(self, x+x1, y1+tl, 
                 args.merge(:text=>l, :fill=>tcolor,
                            :font=>tfont, :anchor=>an)
                )
  }
---------------------------------------------------------------

However, if you want to create beautiful graphs, 
I recommend you to use BLT ( or Tcllib(Tklib) ) extension.
Current Ruby/Tk has a binding for BLT ( and Tcllib(Tklib) ).
-- 
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)