code: public void setReal( T[] vector )
      {
          if ( vector.length != getSize() )
          {
              throw new IllegalArgumentException("Matrix dimensions do not match. " + getSize() + " not " + vector.length);
          }
          System.arraycopy(vector, 0, real, 0, vector.length);
      }
docs: Sets real part of matrix
  
  @param vector - column-packed vector of elements