[Unix-help] Perl Graphics :: Help

[Satyarth Negi]

Hi All , 
              I need to draw multiple annotated plots on a single
graph .  I tried few modules but didnt find one which i can use .
Can you suggest me how to solve this problem , which module to use and
a sample script or URL of some online documentation .

Please reply me at satyarth.negi at gmail.com


Iam trying DBD::Chart::Plot module for this ,  and running the
following script :

----------------------------------------

#!/usr/local/bin/perl
use GD;
use DBD::Chart::Plot ;

    my $img = DBD::Chart::Plot->new(400,300);
    my @xdataset = (1,2,3,4,5,6);
    my @ydataset = (4.3,5.1,1.6,3,11.2,2);
    $img->setPoints(\@xdataset, \@ydataset, 'blue line nopoints');

    $img->setOptions (
        horizMargin => 75,
        vertMargin => 100,
        title => 'My Graph Title',
        xAxisLabel => 'my X label',
        yAxisLabel => 'my Y label' );
   open (WR,'>plot.png') or die ("Failed to write file: $!");
   binmode WR;            
   print WR $img->plot();
   close WR;
---------------------------------------------------

On execution of this script , file "plot.png" is produced but it is empty . 
Please guideme through , Im simply stuck with it .
 
Please reply me at satyart.negi at gmail.com

Thanks and Regards 
Satyarth