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use strict;
use t::locale_hack;
use Test;
use Statistics::Basic qw(:all toler=0.000_001);
plan tests => 7;
my $corr = new Statistics::Basic::Correlation([1 .. 10], [1 .. 10]);
ok( $corr == 1 )
or warn "\ncorr: $corr";
$corr->insert( 11, 7 );
ok( $corr == ( (129/20) / (sqrt(609/100) * sqrt(165/20))))
or warn "\ncorr: $corr";
$corr->set_vector( [11 .. 13], [11 .. 13] );
ok( $corr == 1 );
$corr->ginsert( 13, 12 );
ok( $corr == ( (1/2) / (sqrt(11/16) * sqrt(1/2)) ))
or warn "\ncorr: $corr";
my $j = new Statistics::Basic::Correlation;
$j->set_vector( [11 .. 13], [11 .. 13] );
ok( $j == 1 )
or warn "\ncorr: $j";
my $c = correlation([4,7,7], [4,7,7]);
ok( $c == 1 )
or warn "\ncorr: $c";
$c->insert(3,4);
ok( $c, correlation([7,7,3], [7,7,4]) );
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