Statistics::Basic::Median - find the median of a list
Invoke it this way:
my $median = median(1,2,3);
Or this way:
my $v1 = vector(1,2,3); my $med = median($v1);
And then either query the values or print them like so:
print "The median of $v1: $med\n"; my $mq = $med->query; my $m0 = 0+$med;
Create a 20 point "moving" median like so:
use Statistics::Basic qw(:all nofill); my $sth = $dbh->prepare("select col1 from data where something"); my $len = 20; my $med = median()->set_size($len); $sth->execute or die $dbh->errstr; $sth->bind_columns( my $val ) or die $dbh->errstr; while( $sth->fetch ) { $med->insert( $val ); if( defined( $m = $med->query ) ) { print "Median: $m\n"; } # This would also work: # print "Median: $med\n" if $med->query_filled; }
The constructor takes a single array ref or a single Statistics::Basic::Vector as arguments. It returns a Statistics::Basic::Median object.
Note: normally you'd use the median() constructor, rather than building these by hand using new().
new()
This module also inherits all the overloads and methods from Statistics::Basic::_OneVectorBase.
This object is overloaded. It tries to return an appropriate string for the calculation or the value of the computation in numeric context.
In boolean context, this object is always true (even when empty).
Paul Miller <jettero@cpan.org>
<jettero@cpan.org>
Copyright 2012 Paul Miller -- Licensed under the LGPL
perl(1), Statistics::Basic, Statistics::Basic::_OneVectorBase, Statistics::Basic::Vector
To install Statistics::Basic, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Statistics::Basic
CPAN shell
perl -MCPAN -e shell install Statistics::Basic
For more information on module installation, please visit the detailed CPAN module installation guide.