code: public void fill(double val ) {
          try {
              ops.fill(mat, val);
          } catch( ConvertToDenseException e) {
              convertToDense();
              fill(val);
          }
      }
docs: <p>
  Sets all the elements in this matrix equal to the specified value.<br>
  <br>
  a<sub>ij</sub> = val<br>
  </p>
  
  @see CommonOps_DDRM#fill(DMatrixD1, double)
  
  @param val The value each element is set to.