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<?php
namespace devfym\IntelliPHP\Math;
class Validation
{
/**
* @param array $expected
* @param array $actual
* @return float
*/
public static function MeanSquaredError(array $expected, array $actual) : float
$n = count($actual);
$total_diff = 0;
for ($i = 0; $i < $n; $i++) {
$total_diff += $actual[$i] - $expected[$i];
}
$total_diff /= $n;
return round($total_diff, 4);
public static function RootMeanSquaredError(array $expected, array $actual) : float
return round(sqrt(abs(self::MeanSquaredError($expected, $actual))), 4);
devfym /
intelliphp
