Java Utililty Methods Vector Add

List of utility methods to do Vector Add

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Description

The list of methods to do Vector Add are organized into topic(s).

Method

Mapadd(List> vectors)
add 
if (vectors == null) {
    throw new IllegalArgumentException("vectors can't be null");
Set<Integer> dimensions = new HashSet<>();
vectors.forEach(d -> dimensions.addAll(d.keySet()));
Map<Integer, Double> composed = new HashMap<>();
dimensions.forEach(d -> {
        double sum = vectors.parallelStream().filter(v -> v.containsKey(d)).mapToDouble(v -> v.get(d))
                .sum();
        composed.put(d, sum);
});
return composed;
voidadd(Vector left, Vector right)
Adds every element of right to left. 
if (right == null) {
    return;
for (int i = 0, n = right.size(); i < n; i++) {
    final Object o = right.elementAt(i);
    left.addElement(o);
VectorAdd(Vector V, String S1, String S2, String S3)
Used to create the Vector of attribute keys and corresponding values in one statement. 
if (V == null)
    V = new Vector<String[]>();
int n = 1;
if (S1 == null)
    return V;
if (S2 != null)
    n++;
if (S3 != null && S2 != null)
...
voidaddAll(Vector vector, Object[] copyFrom)
Appends all items from given array after last item of the vector. 
if (copyFrom == null) {
    return;
vector.ensureCapacity(vector.size() + copyFrom.length);
for (int i = 0; i < copyFrom.length; i++) {
    vector.addElement(copyFrom[i]);
VectoraddArray(Vector vector, Object[] array)
add Array 
for (int i = 0; i < array.length; i++) {
    vector.addElement(array[i]);
return vector;
voidaddToVector(Vector from, Vector to)
add To Vector 
if (from != null)
    for (int i = 0; i < from.size(); i++)
        to.addElement(from.elementAt(i));
double[]vectorAdd(double[] v1, double[] v2)
vector Add 
if (v1.length != v2.length) {
    throw new IllegalArgumentException("v1.length != v2.length");
double[] res = new double[v1.length];
for (int i = 0; i < v1.length; i++) {
    res[i] = v1[i] + v2[i];
return res;
...
double[]vectorAdd(double[] v1, double[] v2)
Performs vector addition. 
double[] result = new double[v1.length];
for (int i = 0; i < result.length; i++) {
    result[i] = v1[i] + v2[i];
return result;
float[]vectorAdd(float[] v1, float[] v2)
Adds to vectors 
float[] newVector = new float[3];
newVector[0] = v1[0] + v2[0];
newVector[1] = v1[1] + v2[1];
newVector[2] = v1[2] + v2[2];
return newVector;
voidvectorAdd3D(float[] array, int vectorIndex, float x, float y, float z)
This method adds the given 3D vector to the vector specified in the array. 
int tempIndex = 3 * vectorIndex;
array[tempIndex] += x;
array[tempIndex + 1] += y;
array[tempIndex + 2] += z;