PHP Doctrine\MongoDB\Aggregation Expr::stdDevSamp 예제들

stdDevSamp() 공개 메소드

The arguments can be any expression as long as it resolves to an array.

또한 보기: https://docs.mongodb.org/manual/reference/operator/aggregation/stdDevSamp/

부터: 1.3

public stdDevSamp ( mixed | self $expression1 )
$expression1	mixed | self

예제 #1

파일: Group.php 프로젝트: malukenho/mongodb

 /**
  * Calculates the sample standard deviation of the input values.
  *
  * The argument can be any expression as long as it resolves to an array.
  *
  * @see https://docs.mongodb.org/manual/reference/operator/aggregation/stdDevSamp/
  * @see Expr::stdDevSamp
  * @param mixed|Expr $expression
  * @return self
  *
  * @since 1.3
  */
 public function stdDevSamp($expression)
 {
     $this->expr->stdDevSamp($expression);
     return $this;
 }