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Another important difference is that ROS_INFO (and ROS_ERR,ROS_WARN, etc..)work as a distributed logging system. Messages are not just shown in the terminal but they are sent over the network to the rosout node. Then the rosout process can unify all the distributed loging, filter data, etc.

Another important difference is that ROS_INFO (and ROS_ERR,ROS_WARN, etc..)work as a distributed logging system. Messages are not just shown in the terminal but they are sent over the network to the rosout node. Then the rosout process can unify all the distributed loging, logging messages for many purposes: filter data, using a unified GUI like rxconsole, etc.