private void calculateBuckets(
Set<? extends Person> persons,
DynamicDoubleArray sums,
DynamicIntArray counts,
String xAttrKey,
String yAttrKey) {
TIntDoubleHashMap sumBuckets = new TIntDoubleHashMap();
TIntIntHashMap countBuckets = new TIntIntHashMap();
for (Person person : persons) {
String xValStr = person.getAttribute(xAttrKey);
String yValStr = person.getAttribute(yAttrKey);
if (xValStr != null && yValStr != null) {
double xVal = Double.parseDouble(xValStr);
double yVal = Double.parseDouble(yValStr);
int bucketIdx = xDataDiscr.index(xVal);
sumBuckets.adjustOrPutValue(bucketIdx, yVal, yVal);
countBuckets.adjustOrPutValue(bucketIdx, 1, 1);
}
}
TIntDoubleIterator it = sumBuckets.iterator();
for (int i = 0; i < sumBuckets.size(); i++) {
it.advance();
int bucketIndex = it.key();
double sum = it.value();
int cnt = countBuckets.get(bucketIndex);
sums.set(bucketIndex, sum);
counts.set(bucketIndex, cnt);
}
}
private double changeBucketContent(int bucketIndex, double value, boolean add) {
double oldDiff = calculateDiff(bucketIndex);
double sum = bucketSums.get(bucketIndex);
int count = bucketCounts.get(bucketIndex);
if (add) {
bucketSums.set(bucketIndex, sum + value);
bucketCounts.set(bucketIndex, count + 1);
} else {
bucketSums.set(bucketIndex, sum - value);
bucketCounts.set(bucketIndex, count - 1);
}
double newDiff = calculateDiff(bucketIndex);
return newDiff - oldDiff;
}
private DynamicIntArray initHistogram(Set<? extends Attributable> elements, String key) {
DynamicIntArray array = new DynamicIntArray(12, 0);
for (Attributable element : elements) {
String strVal = element.getAttribute(key);
if (strVal != null) {
double value = Double.parseDouble(strVal);
int bucket = discretizer.index(value);
array.set(bucket, array.get(bucket) + 1);
}
}
return array;
}
private double changeBucketContent(int bucketIndex, int value) {
double simVal = simFreq.get(bucketIndex);
double refVal = refFreq.get(bucketIndex) * scaleFactor;
// double oldDiff = Math.abs(simVal - refVal)/refVal;
double oldDiff = calculateError(simVal, refVal);
simFreq.set(bucketIndex, simFreq.get(bucketIndex) + value);
simVal = simFreq.get(bucketIndex);
refVal = refFreq.get(bucketIndex) * scaleFactor;
// double newDiff = Math.abs(simVal - refVal)/refVal;
double newDiff = calculateError(simVal, refVal);
return newDiff - oldDiff;
}