my $fh = IO::File->new_tmpfile or die "Unable to make new temp file: $!"; 
foreach $line (<FILE>) 
{
~~~~~blah blah~~~~~~
}
my $data = GD::Graph::Data->new();                     
$data->read(file => ‘$fh’, delimiter => '\t');        
$data = $data -> copy(wanted => [0, 1, 2 
print <$fh>;
while (my @row = $fh->fetchrow_array())     <------line 81
{
$data ->add_point($row);
}
my $graph = GD::Graph::points->new();                  
$graph->set(
x_label     => 'Time/Date',                             
y_label     => 'Latency Count',                         
title       => "Latency Graph between $center1 and $center2", 
) or warn $graph->error;

my $image = $graph->plot($data) or die $graph->error;  

open(IMAGE, ">graph.png") or die "Not able to open image file\n";         
binmode IMAGE;                                          
print IMAGE $image->png or die "Problem writing to image file\n";