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Statistics::Basic::Mean.3pm
Langue: en
Version: 2009-06-28 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
NAME
Statistics::Basic::Mean - find the mean of a listSYNOPSIS
Invoke it this way:my $avg = mean(1,2,3);
Or this way:
my $v1 = vector(1,2,3); my $avg = avg($v1);
And then either query the values or print them like so:
print "The mean of $v1: $avg\n"; my $mq = $avg->query; my $m0 = 0+$avg;
Create a 20 point moving average like so:
use Statistics::Basic qw(:all nofill); my $sth = $dbh->prepare("select col1 from data where something"); my $len = 20; my $avg = mean()->set_size($len); $sth->execute or die $dbh->errstr; $sth->bind_columns( my $val ) or die $dbh->errstr; while( $sth->fetch ) { $avg->insert( $val ); if( defined( my $m = $avg->query ) ) { print "Mean: $m\n"; } # This would also work: # print "Mean: $avg\n" if $avg->query_filled; }
METHODS
- new()
- The constructor takes a single array ref or a single Statistics::Basic::Vector as arguments. It returns a Statistics::Basic::Mean object.
Note: normally you'd use the mean() 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 2009 Paul Miller --- Licensed under the LGPLSEE ALSO
perl(1), Statistics::Basic, Statistics::Basic::_OneVectorBase, Statistics::Basic::VectorContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre