bit::vector::minimal(3pm) [debian man page]

Bit::Vector::Minimal(3pm)				User Contributed Perl Documentation				 Bit::Vector::Minimal(3pm)

NAME

       Bit::Vector::Minimal - Object-oriented wrapper around vec()

SYNOPSIS

	 use Bit::Vector::Minimal;
	 my $vec = Bit::Vector->new(size => 8, width => 1, endianness => "little");
	 # These are the defaults

	 $vec->set(1); # $vec's internal vector now looks like "00000010"
	 $vec->get(3); # 0

DESCRIPTION

       This is a much simplified, lightweight version of Bit::Vector, and wraps Perl's (sometimes confusing) "vec" function in an object-oriented
       abstraction.

METHODS

   new
       Creates a new bit vector. By default, this creates a one-byte vector with 8 one-bit "slots", with bit zero on the right of the bit pattern.
       These settings can be changed by passing parameters to the constructor: "size" will alter the size in bits of the vector; "width" will
       alter the width of the slots. The module will die if "width" is not an integer divisor of "size". "endianness" controls whether the zeroth
       place is on the right or the left of the bit vector.

   set(POS[, VALUE])
       Sets the bit or slot at position "POS" to value "VALUE" or "all bits on" if "VALUE" is not given.

   get(POS)
       Returns the bit or slot at position "POS".

   display
       Display the vector. For debugging purposes.

AUTHOR

       Current maintainer: Tony Bowden

       Original author: Simon Cozens

BUGS and QUERIES
       Please direct all correspondence regarding this module to:
	 bug-Bit-Vector-Minimal@rt.cpan.org

SEE ALSO

       Bit::Vector

COPYRIGHT AND LICENSE

       Copyright 2003, 2004 by Kasei

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

perl v5.12.3							    2005-10-04						 Bit::Vector::Minimal(3pm)

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

NAME

       Statistics::Basic::Correlation - find the correlation between two lists

SYNOPSIS

       Invoke it this way:

	   my $correlation = correlation( [1,2,3], [1,2,3] );

       Or this way:

	   my $v1  = vector(1,2,3);
	   my $v2  = vector(1,2,3);
	   my $cor = corr($v1,$v2);

       And then either query the values or print them like so:

	   print "The correlation between $v1 and $v2: $correlation
";
	   my $cq = $cor->query;
	   my $c0 = 0+$correlation;

       Create a 20 point "moving" correlation like so:

	   use Statistics::Basic qw(:all nofill);

	   my $sth = $dbh->prepare("select col1,col2 from data where something");
	   my $len = 20;
	   my $cor = corr()->set_size($len);

	   $sth->execute or die $dbh->errstr;
	   $sth->bind_columns( my ($lhs, $rhs) ) or die $dbh->errstr;

	   my $count = $len;
	   while( $sth->fetch ) {
	       $cor->insert( $lhs, $rhs );
	       if( defined( my $c = $cor->query ) ) {
		   print "Correlation: $c
";
	       }

	       # This would also work:
	       # print "Correlation: $cor
" if $cor->query_filled;
	   }

METHODS

       This list of methods skips the methods inherited from Statistics::Basic::_TwoVectorBase (things like query(), insert(), and ginsert()).

       new()
	   Create a new Statistics::Basic::Correlation object.	This function takes two arguments -- which can either be arrayrefs or
	   Statistics::Basic::Vector objects.  This function is called when the correlation() shortcut-function is called.

       query_covariance()
	   Returns the Statistics::Basic::Covariance object used to calculate the correlation.

       query_vector1()
	   Return the Statistics::Basic::Vector for the first vector.

       query_vector2()
	   Return the Statistics::Basic::Vector object for the second vector.

       query_mean1()
	   Returns the Statistics::Basic::Mean object for the first vector.

       query_mean2()
	   Returns the Statistics::Basic::Mean object for the second vector.

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::_TwoVectorBase, Statistics::Basic::Vector

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