Math (average)

**keyboard** · 05-01-2012, 03:24 AM

This isn't working...

Code:

<html>
<head>
<script type="text/javascript" src="math.js"></script>
</head>
<body>
<script type="text/javascript">
var myCars=new Array();
 myCars[0]="1"; 
 myCars[1]="2";
 myCars[2]="3";
 myCars[3]="4"; 
 myCars[4]="5";
 myCars[5]="6";
alert(mean(myCars));
</script>
</body>
</html>

Code:

function mean(elem) {
	var meanTotal = 0;
	for (i=0;i<elem.length;i++) {
		var meanTotal = meanTotal + elem[i];
	}
	alert(meanTotal);
	meanTotal = meanTotal / elem.length;
	return meanTotal;
}
/*
 var a = xyz();
 document.write('x=' + a.x + ' and y = ' + a.y); 
 */

Any help???

**coothead** · 05-01-2012, 09:20 AM

Hi there keyboard1333,

try it like this...

Code:

function mean(elem) {
   var meanTotal=0;
for(i=0;i<elem.length;i++) {
   meanTotal+=parseFloat(elem[i])/elem.length;
 }
   return meanTotal;
 }

coothead

**vwphillips** · 05-01-2012, 09:24 AM

Code:

<html>
<head>
<script type="text/javascript" src="math.js"></script>
</head>
<body>
<script type="text/javascript">
function mean(elem) {
	var meanTotal = 0;
	for (var i=0;i<elem.length;i++) {
// the array fields are strings so ato type(convert~) to numbers
		meanTotal += elem[i]*1;
	}
	alert(meanTotal);
	meanTotal = meanTotal / elem.length;
	return meanTotal;
}

var myCars=[];
 myCars[0]="1";
 myCars[1]="2";
 myCars[2]="3";
 myCars[3]="4";
 myCars[4]="5";
 myCars[5]="6";
alert(mean(myCars));
</script>
</body>
</html>

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