"함수 harmean()"의 두 판 사이의 차이

2020년 11월 2일 (월) 02:36 기준 최신판

HARMEAN
harmonic

1 Excel[ | ]

=HARMEAN(1,2,3,4,5)
// 2.189781022

=HARMEAN(4,5,8,7,11,4,3)
// 5.028375962

=HARMEAN(-1,3,4,10293)
// #NUM!

=HARMEAN(-1,-2,-3,-4,-5)
// #NUM!

2 PHP[ | ]

function harmean() {
	$args = func_get_args();
	$s = 0;
	foreach($args as $n) $s += 1/$n;
	return count($args) / $s;
}

echo harmean( 1, 2, 3, 4, 5 );
// 2.1897810218978
echo harmean( 4, 5, 8, 7, 11, 4, 3 );
// 5.0283759620617
echo harmean( -1, 3, 4, 10293 );
// -9.6022389365052
echo harmean( -1, -2, -3, -4, -5 );
// -2.1897810218978

function array_harmean($arr) {
	$s = 0;
	foreach($arr as $n) $s += 1/$n;
	return count($arr) / $s;
}

echo array_harmean( array(1, 2, 3, 4, 5) );
// 2.1897810218978
echo array_harmean( array(4, 5, 8, 7, 11, 4, 3) );
// 5.0283759620617
echo array_harmean( array(-1, 3, 4, 10293) );
// -9.6022389365052
echo array_harmean( array(-1, -2, -3, -4, -5) );
// -2.1897810218978

3 같이 보기[ | ]

@@ 1번째 줄: / 1번째 줄: @@
 [[분류: 수학]]
+;HARMEAN
+;harmonic
 ==Excel==
 [[category: Excel]]
-<source lang='PHP'>
+<syntaxhighlight lang='PHP'>
 =HARMEAN(1,2,3,4,5)
 // 2.189781022
@@ 15번째 줄: / 17번째 줄: @@
 =HARMEAN(-1,-2,-3,-4,-5)
 // #NUM!
-</source>
+</syntaxhighlight>
 ==PHP==
 [[category: PHP]]
-<source lang='PHP'>
+<syntaxhighlight lang='PHP'>
-function harmonic() {
+function harmean() {
-	$num_args = func_num_args ();
+	$args = func_get_args();
-	$sum = 0;
+	$s = 0;
-	for ($i = 0; $i < $num_args; $i++) {
+	foreach($args as $n) $s += 1/$n;
-		$sum += 1 / func_get_arg ($i);
+	return count($args) / $s;
-	}
-	return $num_args / $sum;
 }
-echo harmonic(1, 2, 3, 4, 5);
+echo harmean( 1, 2, 3, 4, 5 );
+// 2.1897810218978
+echo harmean( 4, 5, 8, 7, 11, 4, 3 );
+// 5.0283759620617
+echo harmean( -1, 3, 4, 10293 );
+// -9.6022389365052
+echo harmean( -1, -2, -3, -4, -5 );
+// -2.1897810218978
+</syntaxhighlight>
+<syntaxhighlight lang='PHP'>
+function array_harmean($arr) {
+	$s = 0;
+	foreach($arr as $n) $s += 1/$n;
+	return count($arr) / $s;
+}
+echo array_harmean( array(1, 2, 3, 4, 5) );
 // 2.1897810218978
-echo harmonic(-1, 3, 4, 10293);
+echo array_harmean( array(4, 5, 8, 7, 11, 4, 3) );
+// 5.0283759620617
+echo array_harmean( array(-1, 3, 4, 10293) );
 // -9.6022389365052
-echo harmonic(-1, -2, -3, -4, -5);
+echo array_harmean( array(-1, -2, -3, -4, -5) );
 // -2.1897810218978
-</source>
+</syntaxhighlight>
 ==같이 보기==
+*[[함수 geomean()]]
 *[[조화평균]]