code: public static void scale( double alpha , DMatrix6 a ) {
          a.a1 *= alpha;
          a.a2 *= alpha;
          a.a3 *= alpha;
          a.a4 *= alpha;
          a.a5 *= alpha;
          a.a6 *= alpha;
      }
docs: <p>
  Performs an in-place element by element scalar multiplication.<br>
  <br>
  a<sub>ij</sub> = &alpha;*a<sub>ij</sub>
  </p>
  
  @param a The vector that is to be scaled.  Modified.
  @param alpha the amount each element is multiplied by.