code: public static void scale( double alpha , DMatrix3 a , DMatrix3 b ) {
          b.a1 = a.a1*alpha;
          b.a2 = a.a2*alpha;
          b.a3 = a.a3*alpha;
      }
docs: <p>
  Performs an element by element scalar multiplication.<br>
  <br>
  b<sub>i</sub> = &alpha;*a<sub>i</sub>
  </p>
  
  @param alpha the amount each element is multiplied by.
  @param a The vector that is to be scaled.  Not modified.
  @param b Where the scaled matrix is stored. Modified.