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sparklines

by neniro (Priest)
on Oct 19, 2005 at 20:08 UTC ( #501403=snippet: print w/ replies, xml ) Need Help??

Description: Sparklines are something that I haven't seen mentioned on perlmonks so far. Sparklines are small graphs that are base64 encoded and embededded into plain html (see: http://www.ietf.org/rfc/rfc2397.txt for further details). There is already a module on cpan: GD::Graph::sparklines to build line-graphs as sparklines. My snippet is just a quick hack to show a way to build different kind of sparklines using GD and MIME::Base64 :
#!/usr/bin/perl

use strict;
use warnings;

use GD::Graph;
use GD::Graph::pie;

use MIME::Base64;

my @data = ( 
    ["1st","2nd"],
    [    1,    2],
);

my $graph = new GD::Graph::pie( 120, 120 );

$graph->set( dclrs       => [ qw( #FECECE #FEFECE #FFFFFF ) ],
             start_angle => 90 );

my $gd = $graph->plot(\@data) or die $graph->error;

print '<IMG SRC="data:image/png;base64,', 
      encode_base64($gd->png),
      '" alt="sparkline"/>';

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