/**
* Construct a vector from another vector.
*
* @param v Vector to copy.
* @param deep If {@code true} perform a deep copy, otherwise perform a shallow copy
* @throws NullArgumentException if {@code v} is {@code null}.
*/
public ArrayFieldVector(ArrayFieldVector<T> v, boolean deep) {
if (v == null) {
throw new NullArgumentException();
}
field = v.getField();
data = deep ? v.data.clone() : v.data;
}
/**
* Construct a vector from another vector, using a deep copy.
*
* @param v Vector to copy.
* @throws NullArgumentException if {@code v} is {@code null}.
*/
public ArrayFieldVector(ArrayFieldVector<T> v) {
if (v == null) {
throw new NullArgumentException();
}
field = v.getField();
data = v.data.clone();
}
/**
* Construct a vector by appending one vector to another vector.
*
* @param v1 First vector (will be put in front of the new vector).
* @param v2 Second vector (will be put at back of the new vector).
* @throws NullArgumentException if {@code v1} or {@code v2} is {@code null}.
*/
public ArrayFieldVector(T[] v1, ArrayFieldVector<T> v2) {
if (v1 == null || v2 == null) {
throw new NullArgumentException();
}
field = v2.getField();
data = buildArray(v1.length + v2.data.length);
System.arraycopy(v1, 0, data, 0, v1.length);
System.arraycopy(v2.data, 0, data, v1.length, v2.data.length);
}
/**
* Find the orthogonal projection of this vector onto another vector.
*
* @param v vector onto which instance must be projected
* @return projection of the instance onto v
* @throws IllegalArgumentException if v is not the same size as this
*/
public ArrayFieldVector<T> projection(ArrayFieldVector<T> v) {
return (ArrayFieldVector<T>) v.mapMultiply(dotProduct(v).divide(v.dotProduct(v)));
}
