note 91522 added to function.stats-stat-correlation
| From: | (LeCong) | Date: | Mon, 15 Jun 2009 04:58:44 +0000 |
| Subject: | note 91522 added to function.stats-stat-correlation | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-156866@lists.php.net to get a copy of this message | ||
Please note that this function is reserved for two arrays with continued numbers inside (just
integers).
I tested this function and found that it calculate the Pearson's Correlation Coefficient of two
arrays.
---
Here's suggested documentation:
stats_stat_correlation â Calculate the Pearson's Correlation Coefficient of two arrays of
continued numbers.
Parameters:
arr1 = array (integer1a, interger2a ...)
arr2 = array (integer1b, interger2b ...))
(Note that the count of elements in two arrays must be equal)
Return value: Pearson's Correlation Coefficient in decimal format (ex. 0.934399822094)
Code examples:
<?php
// Provided by admin@maychu.net
$array_x = array(5,3,6,7,4,2,9,5);
$array_y = array(4,3,4,8,3,2,10,5);
$pearson = stats_stat_correlation($array_x,$array_y);
echo $pearson;
?>
----
Server IP: 210.245.120.83
Probable Submitter: 216.14.112.146
----
Manual Page -- http://www.php.net/manual/en/function.stats-stat-correlation.php
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