I Have tried with my below code as you have said, but its not working. Can you please help me and let me know where i am doing wrong. 
use GD::Graph::bars; 
use GD::Graph::hbars; 
require '/root/.cpan/build/GDGraph-1.48/samples/save.pl';

my @data = ( 
["1st","2nd"], 
[ (3.75,10),(3.75,12) ], 
[ (4.25,3),(4.25,7) ], 
); 

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 => 'X Label', 
y_label => 'Y label', 
title => 'Stacked Bars (incremental)', 
#y_max_value => 50, 
#y_tick_number => 10, 
#y_label_skip => 2, 
cumulate => 4, 
overwrite => 1,
borderclrs => $my_graph->{dclrs}, 
#cycle_clrs => 4, 
bar_spacing => 2, 
#shadow_depth    => 4, 

transparent => 0, 
); 

$my_graph->set_legend( qw(offset increment more)); 
$my_graph->plot(\@data); 
save_chart($my_graph, $name); 
}

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In reply to Re^2: GD::Graph creating a clustered bar chart while some dataset are cumulative by huzefa52
in thread GD::Graph creating a clustered bar chart while some dataset are cumulative by huzefa52

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