public double cossim(TermVectorInt v) {
double dotproduct = 0;
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
dotproduct += v.getInt(entry.getKey()) * entry.getValue();
}
double magnitude = magnitude() * v.magnitude();
return (magnitude == 0) ? 0 : dotproduct / magnitude;
}
public double dotproduct(TermVectorDouble v) {
if (size() > v.size()) return v.dotproduct(this);
double dotproduct = 0;
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
dotproduct += v.getDouble(entry.getKey()) * entry.getValue();
}
return dotproduct;
}
public TermVectorDouble normalize() {
double total = total();
if (total != 1) {
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
entry.setValue(entry.getDoubleValue() / total);
}
}
magnitude = null;
total = 1;
return this;
}
public String getMax() {
double max = Double.MIN_VALUE;
String maxterm = null;
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
if (max < entry.getDoubleValue()) {
max = entry.getDoubleValue();
maxterm = entry.getKey();
}
}
return maxterm;
}
public TermVectorDouble multiply(TermVectorInt v) {
if (size() > v.size()) return v.multiply(this);
TermVectorDouble result = new TermVectorDouble();
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
int d = v.getInt(entry.getKey());
if (d != 0) {
result.put(entry.getKey(), entry.getValue() * d);
}
}
return result;
}
public TermVectorDouble multiply(Map<String, Double> v) {
if (size() > v.size() && v instanceof TermVector) return ((TermVector) v).multiply(this);
TermVectorDouble result = new TermVectorDouble();
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
Double d = v.get(entry.getKey());
if (d != 0) {
result.put(entry.getKey(), entry.getValue() * d);
}
}
return result;
}
public double cossimDebug(TermVectorDouble v) {
if (this.size() > v.size()) {
return v.cossimDebug(this);
}
double dotproduct = 0;
for (Object2DoubleMap.Entry<String> entry : object2DoubleEntrySet()) {
dotproduct += v.getDouble(entry.getKey()) * entry.getDoubleValue();
log.info(
"%s %f %f %s",
entry.getKey(), v.getDouble(entry.getKey()), entry.getDoubleValue(), dotproduct);
}
double magnitude = magnitude() * v.magnitude();
log.info("magnitude %s %s %s", magnitude(), v.magnitude(), dotproduct / magnitude);
return (magnitude == 0) ? 0 : dotproduct / magnitude;
}
public void remove(TermVectorDouble v) {
for (Object2DoubleMap.Entry<String> entry : v.object2DoubleEntrySet()) {
add(entry.getKey(), -entry.getDoubleValue());
}
magnitude = null;
}