ML

Similarities	Java	Python
Load CSV	Table.read().csv()	pd.read_csv()
Fill missing	setMissingTo(median)	fillna(median)
Drop columns	removeColumns(...)	drop(columns=...)
Encode categories	replaceAll(...)	map({...})
Normalize	normalize()	(val - min) / (max - min)
Convert to model input	Instances, DenseInstance(...)	DataFrame → array → model
Train model	J48, Logistic, CV	DecisionTree, LogReg, CV

public void addNode() {
    adjacencyList.add(new LinkedList<>());
    nodes++;
    System.out.println("Node " + (nodes - 1) + " added.");
}

public void removeEdge(int source, int destination) {
    if (source < nodes && destination < nodes) {
        if (adjacencyList.get(source).remove(Integer.valueOf(destination))) {
            System.out.println("Edge from " + source + " to " + destination + " removed.");
        } else {
            System.out.println("Edge from " + source + " to " + destination + " does not exist.");
        }
    } else {
        System.out.println("Invalid node index.");
    }
}