Calculate cosine similarity between two double[]'s

gistfile1.java

    /**
     * 
     * @param one first Vector
     * @param two second Vector
     * @return cosine similarity as defined by <pre>dot(one,two) / ||one|| * ||two||</pre>
     * returns 1 for same direction (similar)<br>
     * returns 0 for perpendicular<br>
     * returns -1 for opposite direction
     */
public double getCosineDistance(double[] one, double[] two) {
	double mag1 = 0;
	for (double d : one) {
	    mag1 += d*d;
	}
	//magnitude of first: square root of sum of squares
	mag1 = Math.pow(mag1, 0.5);
	
	double mag2 = 0;
	for (double d : two) {
	    mag2 += d*d;
	}
	//magnitude of second: square root of sum of squares
	mag2 = Math.pow(mag2, 0.5);
	
	//calculate dot product
	double dot = 0;
	for (int i=0; i<one.length; i++) {
		dot += one[i]*two[i];
	}
	//result is dot product divided by product of magnitudes
	return dot / (mag1*mag2);
}