use Chart::PNGgraph::linespoints;
print STDERR "Processing sample 4-1\n";
@data = (
["1st","2nd","3rd","4th","5th","6th","7th", "8th", "9th"],
[undef, 52, 53, 54, 55, 56, undef, 58, 59],
[60, 61, 61, undef, 68, 66, 65, 61, undef],
);
$my_graph = new Chart::PNGgraph::linespoints( );
$my_graph->set(
x_label => 'X Label',
y_label => 'Y label',
title => 'A Lines and Points Graph',
y_max_value => 80,
y_tick_number => 6,
y_label_skip => 2,
markers => [ 1, 5 ],
);
$my_graph->set_legend( 'data set 1', 'data set 2' );
$my_graph->plot_to_png( "sample41.png", \@data );
exit;