median

Statistics::Basic::Median(3pm)				User Contributed Perl Documentation			    Statistics::Basic::Median(3pm)

NAME

       Statistics::Basic::Median - find the median of a list

SYNOPSIS

       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
";
	   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
";
	       }

	       # This would also work:
	       # print "Median: $med
" if $med->query_filled;
	   }

METHODS

       new()
	   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()".

       _OVB::import()
	   This module also inherits all the overloads and methods from Statistics::Basic::_OneVectorBase.

OVERLOADS

       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).

AUTHOR

       Paul Miller "<jettero@cpan.org>"

COPYRIGHT

       Copyright 2012 Paul Miller -- Licensed under the LGPL

SEE ALSO

       perl(1), Statistics::Basic, Statistics::Basic::_OneVectorBase, Statistics::Basic::Vector

perl v5.14.2							    2012-01-23					    Statistics::Basic::Median(3pm)