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lib/Imager/Heatmap.pm  view on Meta::CPAN

    );

    # Add point datas to construct density matrix
    $hmap->insert_datas(@piont_datas); # @point_datas should be: ( [ x1, y1, weight1 ], [ x2, y2, weight2 ] ... )

    $hmap->insert_datas(...); # You can call multiple times to add large data that cannot process at a time.

    # After adding datas, you could get heatmap as Imager instance.
    my $img = $hmap->draw;

    # Returned image is 4-channels image. So you can overlay it on other images.
    $base_img->rubthrough( src => $hmap->img );  # Overlay on other images(see Imager::Transformations)

    # And you can access probability density matrix using matrix method if you like.
    # In case, maybe you would like to create some graduations which be assigned to color of heatmap and its value.
    $hmap->matrix;

=head1 DESCRIPTION

Imager::Heatmap is a module to draw heatmap using Imager.