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How to get only time stamp in a big topic in a command line

asked 2020-09-06 22:10:32 -0500

bigbellmercy gravatar image

Because the size of a topic is quite big (like point cloud), the 'rostopic echo' command cannot show the time stamp in a terminal because of the scroll pressure and 'rqt' software freezes itself when 'topic monitor' is enabled for the topic.

So, how can we get only time stamp in a big topic by a command line in a terminal?

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answered 2020-09-07 00:18:25 -0500

mgruhler gravatar image

rostopic echo /my/very/big/topic/header/stamp

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Wow! Very good mysterious(?) function!

bigbellmercy gravatar image bigbellmercy  ( 2020-09-07 00:24:08 -0500 )edit

No, see the wiki documentation and therein the last documented function.

Actually, this is a duplicate of #q225849

mgruhler gravatar image mgruhler  ( 2020-09-07 01:04:26 -0500 )edit

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Asked: 2020-09-06 22:10:32 -0500

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Last updated: Sep 07 '20