defender-security / vendor / thecodingmachine / safe / deprecated / stats.php

stats.php in Defender Security – Malware Scanner, Login Security & Firewall 6.0.1, at vendor/thecodingmachine/safe/deprecated/stats.php

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1	<?php
2
3	namespace Safe;
4
5	use Safe\Exceptions\StatsException;
6
7	/**
8	* Returns the covariance of a and b.
9	*
10	* @param array $a The first array
11	* @param array $b The second array
12	* @return float Returns the covariance of a and b.
13	* @throws StatsException
14	*
15	*/
16	function stats_covariance(array $a, array $b): float
17	{
18	error_clear_last();
19	$result = \stats_covariance($a, $b);
20	if ($result === false) {
21	throw StatsException::createFromPhpError();
22	}
23	return $result;
24	}
25
26
27	/**
28	* Returns the standard deviation of the values in a.
29	*
30	* @param array $a The array of data to find the standard deviation for. Note that all
31	* values of the array will be cast to float.
32	* @param bool $sample Indicates if a represents a sample of the
33	* population; defaults to FALSE.
34	* @return float Returns the standard deviation on success; FALSE on failure.
35	* @throws StatsException
36	*
37	*/
38	function stats_standard_deviation(array $a, bool $sample = false): float
39	{
40	error_clear_last();
41	$result = \stats_standard_deviation($a, $sample);
42	if ($result === false) {
43	throw StatsException::createFromPhpError();
44	}
45	return $result;
46	}
47
48
49	/**
50	* Returns the Pearson correlation coefficient between arr1 and arr2.
51	*
52	* @param array $arr1 The first array
53	* @param array $arr2 The second array
54	* @return float Returns the Pearson correlation coefficient between arr1 and arr2.
55	* @throws StatsException
56	*
57	*/
58	function stats_stat_correlation(array $arr1, array $arr2): float
59	{
60	error_clear_last();
61	$result = \stats_stat_correlation($arr1, $arr2);
62	if ($result === false) {
63	throw StatsException::createFromPhpError();
64	}
65	return $result;
66	}
67
68
69	/**
70	* Returns the inner product of arr1 and arr2.
71	*
72	* @param array $arr1 The first array
73	* @param array $arr2 The second array
74	* @return float Returns the inner product of arr1 and arr2.
75	* @throws StatsException
76	*
77	*/
78	function stats_stat_innerproduct(array $arr1, array $arr2): float
79	{
80	error_clear_last();
81	$result = \stats_stat_innerproduct($arr1, $arr2);
82	if ($result === false) {
83	throw StatsException::createFromPhpError();
84	}
85	return $result;
86	}
87
88
89	/**
90	* Returns the variance of the values in a.
91	*
92	* @param array $a The array of data to find the standard deviation for. Note that all
93	* values of the array will be cast to float.
94	* @param bool $sample Indicates if a represents a sample of the
95	* population; defaults to FALSE.
96	* @return float Returns the variance on success; FALSE on failure.
97	* @throws StatsException
98	*
99	*/
100	function stats_variance(array $a, bool $sample = false): float
101	{
102	error_clear_last();
103	$result = \stats_variance($a, $sample);
104	if ($result === false) {
105	throw StatsException::createFromPhpError();
106	}
107	return $result;
108	}
109