gistfile1.txt

/**
 *
 * @author Patrick Bisenius
 */
public class MathUtil {
	
	public static double scalarProduct(double[] v1, double[] v2) {
		
		double scalarProduct = 0;
		
		for(int i = 0; i < v1.length; i++) {
			scalarProduct += v1[i] * v2[i];
		}
		
		return scalarProduct;
		
	}
	
	public static double cosine(double[] v1, double[] v2) {
		return scalarProduct(v1, v2) / (Math.sqrt((scalarProduct(v1, v1) * scalarProduct(v2, v2))));
	}
}