You also should look at PDL, but I have no idea how well that works on win32, especially getting all the extra graphics output modules compiled right.

I can provide some details in that regard. The PGPLOT and GD graphics capabilities are certainly available, and come with the PDL ppm package available from the Uwinnipeg repository.

OpenGL access is also available to PDL via PDL::Graphics::OpenGL::Perl::OpenGL. It builds fine for me on Win32, though it's still in the development stage. I don't personally use any of this stuff, so I don't know what sort of milage is provided. All I know is that 'dmake test' (or 'nmake test', as the case may be) works fine.

Cheers,
Rob

This draws a million point line graph. It takes maybe 3 seconds, requires around 600MB and isn't very useful, but it has no problem handling it.

#! perl -slw
use strict;
use GD::Graph::lines;

our $N ||= 1e6;

my( @x, @y );
push( @x, int rand 1024 ), push( @y, int rand 768 ) for 1 .. $N;
my @sortOrder = sort{ $x[ $a ] <=> $x[ $b ] } 0 .. $#x;
@x = @x[ @sortOrder ];
@y = @y[ @sortOrder ];

my $g = GD::Graph::lines->new( 1024, 768 ) or die $!;
$g->set( no_axes => 1 );
my $gd = $g->plot( [ \@x, \@y ] ) or die $g->error;

open PNG, '>:raw', 'graph.png' or die $!;
print PNG $gd->png;
close PNG;

system 'graph.png';
[download]

Could you please elaborate on how to use Graphviz to generate a lines plot?

It can generate charts that display graphs and trees, but I don't see how it can generate line plots...