Data::...Buckets(3pm)

💖 NAME 💖

Data::DownSample::LargestTriangleThreeBuckets — it downsamples a data set while retaining its visual characteristics. 🦋

(and yes bestie, this page lives in the User Contributed Perl Documentation section, manual page Data::...Buckets(3pm), okurrr ✨)

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✨ VERSION ✨

Version 1.00 💅

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🌸 DESCRIPTION 🌸

So bestie, listen. This module implements a downsample technique known as Largest Triangle Three Buckets, as defined in Sveinn Steinarsson's MS thesis.

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

The idea — and this is the part that's genuinely iconic — 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. It's 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. 🚀

like… fewer points, same vibe. the chart still eats. periodt. 👑

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🦋 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);

load your data source there as a reference to a list of a list, and that last line is literally the whole thing. you construct with a threshold, you call lttb, you get sampled data back. no cap. 💖

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💅 SUBROUTINES/METHODS 💅

lttb()

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

You can also overwrite the class threashold variable on the fly, like this:

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

(yeah, it's spelled threashold up in here, we don't touch it, we respect the source 🙈)

This function is an optimized version of the algorithm given in Sveinn Steinarsson's paper. Several of the math operations 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's paper, and it's used to verify that the optimized version is giving correct results. so it's the trustworthy older sibling fr fr 🫶

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🎀 AUTHOR 🎀

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

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💀 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. bestie you will not be left on read, promise 😭💜

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🫶 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/>

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👑 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 REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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and that's the whole page bestie 💅 this one was generated with perl v5.32.0 on 2021-01-12, and it's filed under Data::...Buckets(3pm). go downsample something pretty 💖✨🦋🎀