#!/usr/bin/perl -w 
use strict;
use TimeSeries;
use Getopt::Long;

my $output_format ='png';
GetOptions('output_format|output-format=s' => \$output_format) 
    or die "Usage: $0 [--output_format format] [files...]\n";


binmode STDOUT, ':raw';

my $ts = TimeSeries->new(output_format => $output_format);
while (<>) {
    my @legend = split;
    shift @legend;	# first must be for timestamp
    $ts->legend(@legend);
    last;
}
while (<>) {
    my ($timestamp, @values) = split();
    $ts->add_timestring($timestamp, @values);
}

my $g = $ts->plot();
print $g