code: public static double elementMaxReal( ZMatrixD1 a ) {
          final int size = a.getDataLength();
  
          double max = a.data[0];
          for( int i = 2; i < size; i += 2 ) {
              double val = a.data[i];
              if( val > max ) {
                  max = val;
              }
          }
  
          return max;
      }
docs: <p>
  Returns the value of the real element in the matrix that has the minimum value.<br>
  <br>
  Min{ a<sub>ij</sub> } for all i and j<br>
  </p>
  
  @param a A matrix. Not modified.
  @return The the minimum value out of all the real values.