NAME

       Statistics::Welford - Standard statistics using Welford's algorithm

SYNOPSIS

         my $stat = Statistics::Welford->new;

         while (1) {
               $stat->add(rand);
               ...
         }

         print $stat->mean;

DESCRIPTION

       Standard statistics using Welford's algorithm

METHODS

   new
         my $stat = Statistics::Welford->new;

       The "new" constructor lets you create a new Statistics::Welford object.

   add
       Add an entry to the statistics base

   n
       Returns the number of entries to the statistics base

   min
       Returns the minimum number in the statistics base

   max
       Returns the maximum number in the statistics base

   mean
       Returns the mean value

   variance
       Returns the variance value

   standard_deviation
       Returns the standard deviation value

AUTHOR

       Kaare Rasmussen <kaare@cpan.org>.

COPYRIGHT

       Copyright (C) 2010, Kaare Rasmussen

       This module is free software; you can redistribute it or modify it under the same terms as
       Perl itself.