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<?php
namespace Phperf\Pipeline\Vector;
class DropAnomaly implements VectorProcessor
{
private $deviation;
private $prevValue;
/** @var VectorProcessor */
private $processor;
public function __construct($deviation = 0.5)
$this->deviation = $deviation;
$this->processor = new MovingAverage(6);
}
public function value($value)
if (null !== $this->prevValue) {
$delta = abs($value - $this->prevValue);
$allowedDelta = abs($this->deviation * $this->prevValue);
if ($delta > $allowedDelta) {
return null;
} else {
$this->prevValue = $this->processor->value($value);
return $value;
phperf /
pipeline
