Statistics::standardDeviationPartition() - Code Metrics - Inspection of "Start work on branch 1.x" - drupol/phpartition - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#2)

by Pol

created 2019-05-10 20:42 UTC

Statistics::standardDeviationPartition() A

↳ Parent: Statistics

Complexity

Conditions	1
Paths	1

Size

Total Lines	12
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	6
nc	1
nop	1
dl	0
loc	12
rs	10
c	0
b	0
f	0

<?php

declare(strict_types = 1);

namespace drupol\phpartition\Utils;

use drupol\phpartition\Partition\Partition;
use drupol\phpartition\Partitions\Partitions;

/**
 * Class Statistics.
 */
class Statistics
{
    /**
     * @param \drupol\phpartition\Partition\Partition $partition
     *
     * @return float|int
     */
    public static function meanPartition(Partition $partition)
    {
        return $partition->getWeight() / $partition->count();
    }
    /**
     * @param \drupol\phpartition\Partition\Partition $partition
     *
     * @return float
     */
    public static function standardDeviationPartition(Partition $partition)
    {
        $mean = self::meanPartition($partition);

        $sumSquareDiff = \array_sum(\array_map(
            static function ($sum) use ($mean) {
                return ($sum - $mean) ** 2;
            },
            $partition->getArrayCopy()
        ));

        return ($sumSquareDiff / $partition->count()) ** .5;
    }
    /**
     * @param \drupol\phpartition\Partitions\Partitions $partitions
     *
     * @return float
     */
    public static function standardDeviationPartitions(Partitions $partitions)
    {
        $partition = new Partition(
            \array_map(
                static function (Partition $partition) {
                    return $partition->getWeight();
                },
                $partitions->partitions()
            )
        );

        return self::standardDeviationPartition($partition);
    }
}


1			<?php
2
3			declare(strict_types = 1);
4
5			namespace drupol\phpartition\Utils;
6
7			use drupol\phpartition\Partition\Partition;
8			use drupol\phpartition\Partitions\Partitions;
9
10			/**
11			* Class Statistics.
12			*/
13			class Statistics
14			{
15			/**
16			* @param \drupol\phpartition\Partition\Partition $partition
17			*
18			* @return float\|int
19			*/
20			public static function meanPartition(Partition $partition)
21			{
22			return $partition->getWeight() / $partition->count();
23			}
24			/**
25			* @param \drupol\phpartition\Partition\Partition $partition
26			*
27			* @return float
28			*/
29			public static function standardDeviationPartition(Partition $partition)
30			{
31			$mean = self::meanPartition($partition);
32
33			$sumSquareDiff = \array_sum(\array_map(
34			static function ($sum) use ($mean) {
35			return ($sum - $mean) ** 2;
36			},
37			$partition->getArrayCopy()
38			));
39
40			return ($sumSquareDiff / $partition->count()) ** .5;
41			}
42			/**
43			* @param \drupol\phpartition\Partitions\Partitions $partitions
44			*
45			* @return float
46			*/
47			public static function standardDeviationPartitions(Partitions $partitions)
48			{
49			$partition = new Partition(
50			\array_map(
51			static function (Partition $partition) {
52			return $partition->getWeight();
53			},
54			$partitions->partitions()
55			)
56			);
57
58			return self::standardDeviationPartition($partition);
59			}
60			}
61

drupol / phpartition

Pull Request — master (#2)

Statistics::standardDeviationPartition() A

Complexity

Size

Duplication

Importance

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