doc/snippets/Cwise_isNaN.cpp

*bf2c3715SXin LiArray3d v(1,2,3);
*bf2c3715SXin Liv(1) *= 0.0/0.0;
*bf2c3715SXin Liv(2) /= 0.0;
*bf2c3715SXin Licout << v << endl << endl;
*bf2c3715SXin Licout << isnan(v) << endl;