/usr/share/perl5/Statistics/Basic/Mode.pod is in libstatistics-basic-perl 1.6607-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | =head1 NAME
Statistics::Basic::Mode - find the mode of a list
=head1 SYNOPSIS
Invoke it this way:
my $mode = mode(1,2,3,3);
Or this way:
my $v1 = vector(1,2,3,3);
my $mod = mode($v1);
And then either query the values or print them like so:
print "The mod of $v1: $mod\n";
my $mq = $mod->query;
my $m0 = 0+$mod; # this will croak occasionally, see below
The mode of an array is not necessarily a scalar. The mode of this vector is a
vector:
my $mod = mode(1,2,3);
my $v2 = $mod->query;
print "hrm, there's three elements in this mode: $mod\n"
if $mod->is_multimodal;
Create a 20 point "moving" mode like so:
use Statistics::Basic qw(:all nofill);
my $sth = $dbh->prepare("select col1 from data where something");
my $len = 20;
my $mod = mode()->set_size($len);
$sth->execute or die $dbh->errstr;
$sth->bind_columns( my $val ) or die $dbh->errstr;
while( $sth->fetch ) {
$mod->insert( $val );
if( defined( my $m = $mod->query ) ) {
print "Mode: $m\n";
}
print "Mode: $mod\n" if $mod->query_filled;
}
=head1 METHODS
=over 4
=item B<new()>
The constructor takes a list of values, a single array ref, or a single
L<Statistics::Basic::Vector> as arguments. It returns a
L<Statistics::Basic::Mode> object.
Note: normally you'd use the L<mean()|Statistics::Basic/mode()> constructor,
rather than building these by hand using C<new()>.
=item B<is_multimodal()>
L<Statistics::Basic::Mode> objects sometimes return L<Statistics::Basic::Vector>
objects instead of numbers. When C<is_multimodal()> is true, the mode is a
vector, not a scalar.
=item B<_OVB::import()>
This module also inherits all the overloads and methods from
L<Statistics::Basic::_OneVectorBase>.
=back
=head1 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).
If evaluated as a string, L<Statistics::Basic::Mode> will try to format a number
(like any other L<Statistics::Basic> object), but if the object
L</is_multimodal()>, it will instead return a L<Statistics::Basic::Vector> for
stringification.
$x = mode(1,2,3);
$y = mode(1,2,2);
print "$x, $y\n"; # prints: [1, 2, 3], 2
If evaluated as a number, a L<Statistics::Basic::Mode> will raise an error when
the object L</is_multimodal()>.
=head1 AUTHOR
Paul Miller C<< <jettero@cpan.org> >>
=head1 COPYRIGHT
Copyright 2012 Paul Miller -- Licensed under the LGPL
=head1 SEE ALSO
perl(1), L<Statistics::Basic>, L<Statistics::Basic::_OneVectorBase>, L<Statistics::Basic::Vector>
=cut
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