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added density function back in

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This commit is contained in:
Dominick Pham 2009-08-23 23:53:45 -04:00
parent e19f1c475c
commit cd9cd23727
1 changed files with 22 additions and 0 deletions
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22
js/franz.js
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@ -218,6 +218,28 @@ var franz = {
franz.indexSort(franz.clone(franz.light), 0, franz.alpha.length);
franz.displayColors(franz.origIndex);
return false;
},
/* calculates density of array data given interval and step size - both controlling data error
step size should ideally be < interval. Returns array with (# of intervals) as size */
getDensity: function(inputArray, step, interval, max) {
var size = max/step;
var densityArray = new Array(size);
for (var i=0; i < size; i++) {
var count = 0;
for (var j=0; j < inputArray.length; j++) {
// if entry is within current interval
if ((inputArray[j] > i*step) && (inputArray[j] < i*step + interval)){
count++;
}
}
console.log("frequency of values between " + i*step + " and " + (i*step + interval) + " = " + count);
densityArray[i] = count;
}
return densityArray;
},
/* bubble sort floats around and pops in your face */