NAME Array::Sample::SysRand - Systematic random sampling from an array VERSION This document describes version 0.003 of Array::Sample::SysRand (from Perl distribution Array-Sample-SysRand), released on 2022-05-20. SYNOPSIS use Array::Sample::SysRand qw(sample_sysrand); sample_sysrand([0,1,2,3,4,5,6,7,8,9], 5); => (5, 7, 9, 1, 3) sample_sysrand([0,1,2,3,4,5,6,7,8,9], 5); => (2, 4, 6, 8, 0) sample_sysrand([0,1,2,3,4,5,6,7,8,9], 3); => (2, 6, 9) sample_sysrand([0,1,2,3,4,5,6,7,8,9], 3); => (4, 8, 1) DESCRIPTION FUNCTIONS All functions are not exported by default, but exportable. sample_sysrand Syntax: sample_sysrand(\@ary, $n [ , \%opts ]) => list Options: * pos => bool If set to true, will return positions instead of the elements. The function takes an array reference ("\@ary") and the number of samples requested ($n) and will return a list of samples. It will start from a random position to get the first sample then jump at fixed interval to get the subsequent ones. HOMEPAGE Please visit the project's homepage at <https://metacpan.org/release/Array-Sample-SysRand>. SOURCE Source repository is at <https://github.com/perlancar/perl-Array-Sample-SysRand>. SEE ALSO About systematic (random) sampling: <https://www.investopedia.com/terms/s/systematic-sampling.asp> Other sampling methods: Array::Sample::Partition, Array::Sample::SimpleRandom, Array::Sample::WeightedRandom AUTHOR perlancar <perlancar@cpan.org> CONTRIBUTING To contribute, you can send patches by email/via RT, or send pull requests on GitHub. Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via: % prove -l If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla plugin and/or Pod::Weaver::Plugin. Any additional steps required beyond that are considered a bug and can be reported to me. COPYRIGHT AND LICENSE This software is copyright (c) 2022 by perlancar <perlancar@cpan.org>. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. BUGS Please report any bugs or feature requests on the bugtracker website <https://rt.cpan.org/Public/Dist/Display.html?Name=Array-Sample-SysRand> When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.