Read Array Data from Rosbag file

Question

Paul King 2017-9-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/358416-read-array-data-from-rosbag-file

回答： Cam Salzberger 2017-10-30

I have a ROS bag file which has recorded data at each iteration as a row, these are coefficients of an estimated equation so it makes sense to group them in this manner. In ROS I can use rosplay and see all of these coefficients changing so I am happy that the log file contains the data I want to see.

When I try and load this data into matlab using the ros tools it doesn't pick up the dimension information and I just end up with a single array of zeros.

Any ideas

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Answer 1

Cam Salzberger 2017-10-30

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https://ww2.mathworks.cn/matlabcentral/answers/358416-read-array-data-from-rosbag-file#answer_288523

Hello Paul,

What message type is it that contains the data? If it is a custom message, you'll need to go through the ROS Custom Message workflow for MATLAB to be able to read them.

Otherwise, do you have an example small bag file, or a similar bag you've had issues with online somewhere?

-Cam