Java Utililty Methods Array Multiply

double[][] mult(double[][] A, double[][] B)
mult

if (A.length != B.length)
 throw new IllegalArgumentException("dim A != dim B");
double[][] AB = buildZeroMatrix(A.length);
for (int i = 0; i < A.length; i++) {
 for (int j = 0; j < A.length; j++) {
 AB[i][j] = 0;
 for (int k = 0; k < A.length; k++) {
 AB[i][j] += A[i][k] * B[k][j];
...

float[] mult(float[] nums, float n)
mult

assert !Float.isInfinite(n) : "Trying to multiply " + Arrays.toString(nums) + " by " + n; 
for (int i = 0; i < nums.length; i++)
 nums[i] *= n;
return nums;

float[] mult(float[] nums, float n)
mult

assert !Float.isInfinite(n) : "Trying to multiply " + Arrays.toString(nums) + " by " + n; 
for (int i = 0; i < nums.length; i++)
 nums[i] *= n;
return nums;

byte[] multiply(byte[] a, byte b)
a * b

if (a == null)
 throw new IllegalArgumentException("a should not be null");
int len = a.length;
byte[] result = new byte[len];
int carry = 0;
int i2 = byte2int(b);
for (int i = len - 1; 0 <= i; i--) {
 int i1 = byte2int(a[i]); 
...

double[] multiply(double factor, double[] vector)
multiply

double[] result = new double[vector.length];
for (int i = 0; i < vector.length; i++) {
 result[i] = vector[i] * factor;
return result;

double[] multiply(double[] a, double m)
Multiply each element in the given array by the given factor.

for (int i = 0; i < a.length; i++) {
 a[i] *= m;
return a;

void multiply(double[] a, double v)
Multiplies a constant to all elements in the array.

for (int i = 0; i < a.length; i++) {
 a[i] *= v;

double[] multiply(double[] a, double[] b)
multiply

if (a.length != b.length) {
 throw new IllegalArgumentException("Arrays must be equal length");
double[] c = new double[a.length];
for (int i = 0; i < a.length; i++) {
 c[i] = a[i] * b[i];
return c;
...

double[] multiply(double[] a, double[] b)
multiply

final double[] res = Arrays.copyOf(a, a.length);
for (int i = 0; i < res.length; ++i) {
 res[i] *= b[i];
return res;

double[] multiply(double[] a, double[] b)
multiply

double[] out = new double[a.length];
for (int i = 0; i < a.length; i++) {
 out[i] = a[i] * b[i];
return out;