Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Subscribe multiple topics using fuzzy string matching?

asked 2020-11-27 16:04:05 -0500

runtao
27 ●8 ●12 ●18

updated 2020-11-27 17:09:26 -0500

Hi, let's say I want to subscribe multiple topics in one node. All the topics are named with same prefix, such as "/prefix_topic_a","/prefix_topic_b","/prefix_topic_c"...

Since the amount is not fixed, a hard-coding of subscription topic cannot be used. Is there anyway to find all topics with a certain prefix and automatically create subscribers for each topic? maybe using fuzzy string matching? Thanks!

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2020-11-28 01:39:52 -0500

miura

1908 ●1 ●171 ●24 https://twitter.com/miura

It was interesting to me to check it out: https://answers.ros.org/question/2068... You can get a list of topics from the C++ code, as shown in If you can get the topics, you'll be able to make partial matches or create a subscriber from them.

edit flag offensive delete link

Comments

@miura, thanks, but it uses the master node in ROS1, which ROS2 dosen't have. How could the functionality be used in ROS2?

runtao ( 2020-11-28 04:35:47 -0500 )edit

For ROS2, it seems that get_topic_names_and_types can be used.

You can also use get_topic_names_and_types in ROS2. http://docs.ros2.org/bouncy/api/rclcp...

miura ( 2020-11-28 04:40:39 -0500 )edit

add a comment

Question Tools

2 followers

Stats

Asked: 2020-11-27 16:04:05 -0500

Seen: 294 times

Last updated: Nov 28 '20

Subscribe multiple topics using fuzzy string matching? edit

1 Answer

Comments

Question Tools

Stats

Related questions

Subscribe multiple topics using fuzzy string matching?