Thanks a lot, your solution works for me. Just i am making the graph more attractive now, I am putting values on the top of each bar. But for some values when your run below code you will see like 30, 50 and 90 these numbers are not visible properly. And also i don't want 0 to show there. Can you please help me in this

#!/usr/bin/perl
use strict;
use GD;
use GD::Graph::mixed;
use GD::Graph::colour;
use GD::Graph::bars; 
use GD::Graph::hbars; 
use GD::Graph::Data;
use GD::Text;
use GD::Graph::pie;
#use GD::Font;
my @data = (  
['Mon','-','Tues','-','Wed','-'],
[10,0,40,0,80,0], 
[30,0,50,0,90,0], 
[0,100,0,60,0,30], 
[0,60,0,70,0,50],
); 
 
my @names = qw/sample15 sample15-h/; 
for my $my_graph (GD::Graph::bars->new, GD::Graph::hbars->new)
{ 
  my $name = shift @names; 
  print STDERR "Processing $name\n"; 

  $my_graph->set( 
   x_label => 'Days', 
   y_label => 'CPU Utilization', 
   y_min_value => 0,
   y_max_value => 200,
   #title => 'Stacked Bars (incremental)', 
   cumulate => 1, 
   #overwrite => 1,
   x_label_position => 1/3,    
  #borderclrs => $my_graph->{dclrs}, 
   dclrs => [ qw( green dgreen  yellow dyellow ) ], 
   transparent => 0, 
   show_values => 1, 
   values_space => 1,
   bar_spacing => 2, 
   bargroup_spacing => 4, 
   accent_treshold => 200, 
 ); 
  $my_graph->set_values_font('/usr/lib/perl5/5.8.8/fonts/nimbus_roman_
+i.pfb', 8);
  $my_graph->set_legend( qw(E-Avg E-Max T-Avg T-Max)); 
  my $gd = $my_graph->plot(\@data); 
  open(IMG, '>',$name.'.gif') or die $!;
  binmode IMG;
  print IMG $gd->gif;
  close IMG;
}
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