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<?php
/**
* This file is part of the Statistical Classifier package.
*
* (c) Cam Spiers <camspiers@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Camspiers\StatisticalClassifier\Transform;
/**
* @author Cam Spiers <camspiers@gmail.com>
* @package Statistical Classifier
*/
class TokensByCategory
{
public function __invoke($tokenCountbyDocument)
{
$transform = array();
foreach ($tokenCountbyDocument as $category => $documents) {
$transform[$category] = array();
foreach ($documents as $document) {
foreach (array_keys($document) as $token) {
if (array_key_exists($token, $transform[$category])) {
$transform[$category][$token] += $document[$token];
} else {
$transform[$category][$token] = $document[$token];
}
}
}
}
return $transform;
}
}