NAME

       Data::DownSample::LargestTriangleThreeBuckets  - downsample a data set while retaining its visual
       characteristics

VERSION

       Version 1.00

DESCRIPTION

       Implements a downsample technique known as Largest Triangle Three Buckets as defined in Sveinn
       Steinarsson MS thesis.

       http://skemman.is/stream/get/1946/15343/37285/3/SS_MSthesis.pdf

       The idea is to downsample a data set without losing the visual character of the plotted data.  The
       technique draws on ideas in cartographic generalization or polyline simplification.  This technique is
       often useful in client-server applications such as webserver-browser where the length of the data far
       exceeds the pixels available to plot. Reducing the data size significantly speeds up data transfer and
       rendering time.

SYNOPSIS

       use Data::DownSample::LargestTriangleThreeBuckets;

       my $lttb = new Data::DownSample::LargestTriangleThreeBuckets( {threshold=>1000} );

       my $data_src = [ [1,2], [2,3], [3,4], [4,5], ... ]; # <-- load your data source here as reference to a
       list of a list

       my $data_sampled = $lttb->lttb($data_src);

SUBROUTINES/METHODS

   lttb()
       my $data_sampled = $lttb->lttb($data_src);

       Also can overwrite the class threashold variable such as

       my $data_sampled = $lttb->lttb($data_src,20000);

       This function is an optimized version of the algorithm given in Sveinn Steinarsson paper.  Several of the
       math operation are factored out of the loops and it executes better than 33% faster.

   lttb_ref()
       my $data_sampled = $lttb->lttb_ref($data_src);

       The reference function implimentation of the algorithm given in Sveinn Steinarsson paper and used to
       verify that the optimized version is giving correct results.

AUTHOR

       Steve Troxel, "<troxel at perlworks.com>"

BUGS

       Please report any bugs or feature requests to "bug-data-downsample-largesttrianglethreebuckets at
       rt.cpan.org", or through the web interface at
       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Data-DownSample-LargestTriangleThreeBuckets>.  I will be
       notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

       You can find documentation for this module with the perldoc command.

           perldoc Data::DownSample::LargestTriangleThreeBuckets

       You can also look for information at:

       •   RT: CPAN's request tracker (report bugs here)

           <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Data-DownSample-LargestTriangleThreeBuckets>

       •   AnnoCPAN: Annotated CPAN documentation

           <http://annocpan.org/dist/Data-DownSample-LargestTriangleThreeBuckets>

       •   CPAN Ratings

           <http://cpanratings.perl.org/d/Data-DownSample-LargestTriangleThreeBuckets>

       •   Search CPAN

           <http://search.cpan.org/dist/Data-DownSample-LargestTriangleThreeBuckets/>

LICENSE AND COPYRIGHT

       Copyright 2016 Steve Troxel.

       This program is free software; you can redistribute it and/or modify it under the terms of the the
       Artistic License (2.0). You may obtain a copy of the full license at:

       <http://www.perlfoundation.org/artistic_license_2_0>

       Any use, modification, and distribution of the Standard or Modified Versions is governed by this Artistic
       License. By using, modifying or distributing the Package, you accept this license. Do not use, modify, or
       distribute the Package, if you do not accept this license.

       If your Modified Version has been derived from a Modified Version made by someone other than you, you are
       nevertheless required to ensure that your Modified Version complies with the requirements of this
       license.

       This license does not grant you the right to use any trademark, service mark, tradename, or logo of the
       Copyright Holder.

       This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made,
       use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims
       licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent
       litigation (including a cross-claim or counterclaim) against any party alleging that the Package
       constitutes direct or contributory patent infringement, then this Artistic License to you shall terminate
       on the date that such litigation is filed.

       Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS' AND
       WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.  THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
       PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS
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