1Statistics::Basic::CorrUesleartiCoonn(t3r)ibuted Perl DoSctuamteinsttaitciso:n:Basic::Correlation(3)
2
3
4

NAME

6       Statistics::Basic::Correlation - find the correlation between two lists
7

SYNOPSIS

9       Invoke it this way:
10
11           my $correlation = correlation( [1,2,3], [1,2,3] );
12
13       Or this way:
14
15           my $v1  = vector(1,2,3);
16           my $v2  = vector(1,2,3);
17           my $cor = corr($v1,$v2);
18
19       And then either query the values or print them like so:
20
21           print "The correlation between $v1 and $v2: $correlation\n";
22           my $cq = $cor->query;
23           my $c0 = 0+$correlation;
24
25       Create a 20 point "moving" correlation like so:
26
27           use Statistics::Basic qw(:all nofill);
28
29           my $sth = $dbh->prepare("select col1,col2 from data where something");
30           my $len = 20;
31           my $cor = corr()->set_size($len);
32
33           $sth->execute or die $dbh->errstr;
34           $sth->bind_columns( my ($lhs, $rhs) ) or die $dbh->errstr;
35
36           my $count = $len;
37           while( $sth->fetch ) {
38               $cor->insert( $lhs, $rhs );
39               if( defined( my $c = $cor->query ) ) {
40                   print "Correlation: $c\n";
41               }
42
43               # This would also work:
44               # print "Correlation: $cor\n" if $cor->query_filled;
45           }
46

METHODS

48       This list of methods skips the methods inherited from
49       Statistics::Basic::_TwoVectorBase (things like query(), insert(), and
50       ginsert()).
51
52       new()
53           Create a new Statistics::Basic::Correlation object.  This function
54           takes two arguments -- which can either be arrayrefs or
55           Statistics::Basic::Vector objects.  This function is called when
56           the correlation() shortcut-function is called.
57
58       query_covariance()
59           Returns the Statistics::Basic::Covariance object used to calculate
60           the correlation.
61
62       query_vector1()
63           Return the Statistics::Basic::Vector for the first vector.
64
65       query_vector2()
66           Return the Statistics::Basic::Vector object for the second vector.
67
68       query_mean1()
69           Returns the Statistics::Basic::Mean object for the first vector.
70
71       query_mean2()
72           Returns the Statistics::Basic::Mean object for the second vector.
73

OVERLOADS

75       This object is overloaded.  It tries to return an appropriate string
76       for the calculation or the value of the computation in numeric context.
77
78       In boolean context, this object is always true (even when empty).
79

AUTHOR

81       Paul Miller "<jettero@cpan.org>"
82

84       Copyright 2012 Paul Miller -- Licensed under the LGPL
85

SEE ALSO

87       perl(1), Statistics::Basic, Statistics::Basic::_TwoVectorBase,
88       Statistics::Basic::Vector
89
90
91
92perl v5.34.0                      2022-01-21 Statistics::Basic::Correlation(3)
Impressum