Examples of program
std::vector<int> indices; //保存去除的点的索引
pcl::removeNaNFromPointCloud(*m.cloud,*m.cloud, indices); //去除点云中的NaN点，（m是个结构体对象，参数１是输入，参数二是输出。indices一般不用）
Official document explains the connection
http://docs.pointclouds.org/1.7.0/group__filters.html#gaab4fb955a5a842af97545db7beee1da1
