Source: libstatistics-welford-perl Section: perl Priority: optional Maintainer: Debian Perl Group Uploaders: Axel Beckert Build-Depends: debhelper (>= 9), libmodule-build-perl (>= 0.36) Build-Depends-Indep: perl Standards-Version: 3.9.8 Vcs-Browser: https://anonscm.debian.org/cgit/pkg-perl/packages/libstatistics-welford-perl.git Vcs-Git: https://anonscm.debian.org/git/pkg-perl/packages/libstatistics-welford-perl.git Homepage: https://metacpan.org/release/Statistics-Welford Testsuite: autopkgtest-pkg-perl Package: libstatistics-welford-perl Architecture: all Depends: ${misc:Depends}, ${perl:Depends} Description: Standard statistics using Welford's algorithm Statistics::Welford provides standard statistics (mean value, variance, standard deviation, minimum and maximum value as well as the number of elements) using Welford's algorithm. . Welford's algorithm is much more resource efficient compared to the naïve algorithm implemented in e.g. Statistics::Basic::StdDev or Catmandu::Fix::stat_stddev. It especially does not need to load all values into RAM at the same time, i.e. does not require an array containing all values. . See also https://en.wikipedia.org/wiki/Variance/Algorithm#Online_algorithm