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 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;
}
