ROS Bag File Logging and Analysis

The message data in ROS topics are stored in log files called ROS bag files or rosbags. You can use MATLAB^® functions, apps and Simulink^® blocks to access, filter and execute offline analysis of ROS data in these rosbag files. These bags are often created by subscribing to one or more ROS topics, and storing the received message data in an efficient file structure. For an example of working with rosbags, see Work with rosbag Logfiles.

Use rosbagreader to extract message data from a rosbag and rosbagwriter to create a rosbag log file and write logs to it. You can also use the ROS Logger app to record ROS messages during Simulink simulation. For more information, see Use ROS Logger App to Save ROS Messages from Simulink.

To visualize the messages in a ROS bag log file and view live ROS topics, use ROS Data Analyzer app.