Median calculation in ActionScript 3
- by Gabor Kako
I have a number array and I'd like to calculate the median.
When the array is odd, the calculation is OK, when it's even strange number comes up.
private var numbers:String = "2,5,3,4,6,1";
private var array:Array = numbers.split(",");
private function getMedian(array:Array):Number {
var sortnums:Array = array.sort(Array.NUMERIC);
var length:Number = sortnums.length;
var mid1:Number; var mid2:Number; var median:Number;
if(length % 2 == 0){
mid1 = length / 2; trace("mid1: "+mid1);
mid2= ((length - 1) / 2)-0.5; trace("mid2: "+mid2);
trace ("mid1: "+sortnums[mid1]+", mid2: "+sortnums[mid2]);
median = (sortnums[mid1] + sortnums[mid2]) / 2;
}else{
mid1 = (length / 2)-0.5
median = sortnums[mid1]
}
trace (median);
return median;
}
The result is 21.5, but should be 3.5
mid1 and mid2 are a position in the array.
Could somebody help?
