File Coverage

blib/lib/Catmandu/Fix/stat_variance.pm

Criterion	Covered	Total	%
statement	14	14	100.0
branch			n/a
condition			n/a
subroutine	5	5	100.0
pod	0	1	0.0
total	19	20	95.0

package Catmandu::Fix::stat_variance;

use Catmandu::Sane;
use Moo;
use Catmandu::Fix::Has;
use Statistics::Basic;

has path => (fix_arg => 1);

with 'Catmandu::Fix::SimpleGetValue';

sub emit_value {
    my ($self, $var) = @_;
    "${var} = Statistics::Basic::variance(${var}) if is_array_ref(${var});";
}

=head1 NAME

Catmandu::Fix::stat_mean - calculate the variance of an array

=head1 SYNOPSIS

   # Calculate the variance of foo. E.g. foo => [1,2,3,4]
   stat_variance(foo)  # foo => '1.25'

=head1 SEE ALSO

L<Catmandu::Fix>

=cut

1;