jettero / statistics--basic
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Description: Some really basic statistics functions and convenience macros -- Statistics::Descriptive is probably better, but people still use this.
Homepage: http://search.cpan.org/perldoc?Statistics::Basic
Clone URL: git://github.com/jettero/statistics--basic.git
README
use Statistics::Basic qw(:all);

my $median = median( 1,2,3 );
my $mean   = mean(  [1,2,3]); # array refs are ok too

my $variance = variance( 1,2,3 );
my $stddev   = stddev(   1,2,3 );

my $correlation = correlation( [1 .. 3], [1 .. 3] );