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Read a msg inside a bagfile

asked 2018-04-02 23:21:19 -0500

Teddy_NTU gravatar image

In the rosbag/Code API, we could see the msg by:

 import rosbag
 bag = rosbag.Bag('test.bag')
 for topic, msg, t in bag.read_messages(topics=['chatter', 'numbers']):
     print msg
 bag.close()

When I try this, I see several msg entries. How could I select only one of entries to display?

image description

Like, for example. How could I get the data vector only?

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Please don't use an image to display text. Images are not searchable and people cannot copy and paste them.

jayess gravatar image jayess  ( 2018-04-03 00:39:00 -0500 )edit

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answered 2018-04-03 00:33:50 -0500

ahendrix gravatar image

Instead of printing the whole message with print msg, do print msg.data or whichever field or fields you're interested in.

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Asked: 2018-04-02 23:21:19 -0500

Seen: 133 times

Last updated: Apr 03 '18