I'm guessing this is what you want, a 2 bar graph 
#!perl
use strict;
use warnings;
use GD::Graph::bars; 

my $tb2 = 
"Date       Start Time End Time  Egress     Sent 
08-15-2013 00:22:22   00:22:29   16.53     3.85 
08-15-2013 01:22:22   01:22:28   17.05     3.6  
08-15-2013 02:22:23   02:22:28   16.79     3.61 
08-15-2013 03:22:24   03:23:27  103.89    37.29 
08-15-2013 04:22:24   04:22:26    2.1      0.18 
08-15-2013 11:22:25   11:25:11   73.72    60.98 
08-15-2013 12:22:25   12:27:55  146.65   133.68";

my @records = split /\n/,$tb2;
my $header = shift @records;

my @graph=([],[],[]);
for my $line (@records){
  my @f = split /\s+/,$line;
  print join '|',@f,"\n";
  push $graph[0],"$f[0] $f[1]";
  push $graph[1],$f[3];
  push $graph[2],$f[4];
}

my $my_graph = GD::Graph::bars->new(600,450);
print STDERR "Processing Graph\n"; 
$my_graph->set( 
    x_label => 'Timestamp', 
    x_labels_vertical => 1,
    y_label => 'Data Conveyed/Sent', 
    title => 'Conveyed Vs. Sent', 
    long_ticks => 1, 
    y_max_value => 200, 
    y_tick_number => 8, 
    y_label_skip => 2, 
    bar_spacing => 3, 
    bargroup_spacing => 10,
    shadow_depth => 4, 
    accent_treshold => 200, 
    transparent => 0, ); 

$my_graph->set_legend('Conveyed', 'Sent'); 
my $gd = $my_graph->plot(\@graph); 

# save graph    
my $gif = 'file.gif';    
open(IMG, '>',$gif) or die "Could not open $gif $!";
binmode IMG;
print IMG $gd->gif;
close IMG;
print "$gif created\n";

[download]
poj

In reply to Re: Loading specific columns into arrays by poj
in thread Loading specific columns into arrays by sidsinha

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