| public static cumulativeRelativeFrequency ( array $values ) : array | ||
| $values | array | Ex: ( A, A, A, A, A, A, B, B, B, C ) |
| 리턴 | array | cumulative relative frequency distribution Ex: ( A => 0.6, B => 0.9, C => 1 ) |
public static function cumulativeRelativeFrequency(array $values) : array
{
$sample_size = count($values);
$cumulative_frequencies = self::cumulativeFrequency($values);
return array_map(function ($frequency) use($sample_size) {
return $frequency / $sample_size;
}, $cumulative_frequencies);
}