rqt_plot not plotting data

asked 2013-03-26 06:55:34 -0600

moallen
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updated 2014-03-29 04:54:45 -0600

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Beginner Level Tutorial, 6. Understanding ROS Topics. Examples work as expected until I get to 1.5 Using rqt-plot. The graph shows up but I can't get data to plot (blank graph). Tried all previous steps 4 times but still no plot with x:y or theta. No errors are shown. Reload doesn't help. I'm using fuerte with ubuntu. What can I try? Thanks.

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I have this issue as well, using groovy in Ubuntu. Changing the topic name in the rqt_plot GUI doesn't change the graph, it stays blank.

Rebumble ( 2013-04-24 07:44:53 -0600 )edit

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answered 2013-03-26 16:29:09 -0600

130s

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Make sure you running turtlesim_node running, in order for necessary topics (/turtle1/pose/ in this case) to be published.

Btw however, I haven't been able either to specify topic x:y as an argument from commandline. You can work it around by giving the topic name on GUI's designated field.

Using ros-fuerte-rqt amd64 0.1.6-s1360620793~precise.

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I had the same problem and was not able to specify a topic from command line. Shouldn't this be changed in the tutorial?

Michele Palmia ( 2013-05-16 03:08:18 -0600 )edit

I opened an enhancement request. If you/someone could volunteer to modify the wiki I would appreciate it (right now I have no time to work on that).

130s ( 2013-05-16 07:16:03 -0600 )edit

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I edited the wiki to reflect the actual use of the tool.

Michele Palmia ( 2013-05-17 04:02:52 -0600 )edit

@Michele Palmia great!

130s ( 2013-05-17 04:18:24 -0600 )edit

In groovy it works perfectly well to plot a pose with "rosrun rqt_plot rqt_plot /uav/0/pose/pose/position/x:y:z". So what exactly is not working?

TommyP ( 2013-05-27 23:08:10 -0600 )edit

@TommyP what does this command return dpkg -p ros-groovy-rqt-plot?

130s ( 2013-05-28 00:01:59 -0600 )edit

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Version: 0.2.16-0precise-20130419-1956-+0000

TommyP ( 2013-05-28 00:35:35 -0600 )edit

@TommyP make sure the name of the topic is exactly the full name that's published. In your case do you see `/uav/0/pose/pose/position` is published (check by `rostopic list`)?

130s ( 2013-08-07 14:46:01 -0600 )edit

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answered 2014-08-08 08:22:51 -0600

bit-pirate

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There is a way to get subplots working - not a very convenient one though. @dirk-thomas 's comment in this thread points in the right direction: https://github.com/ros-visualization/...

You can load multiple plugins/instances of a plugin into the same rqt window. The command provided in the comment didn't work for me, but you can do it manually.

Start rqt

$ rqt

Then on the top left select Plugins -> Visualization -> Plot to add a rqt_plot. Repeat this to add more plots.

Note that every plot is independent. For example, if you pause one, the other continues to run.

This does the trick for me. Hope it helps you, too!

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