rqt_plot) multiple topics can't be passed from commandline

[130s]

See this thread. Looks like it was possible in rxplot.

[130s]

I've seen more than a couple of times people posted questions about this on answers.ros. Although that is probably because this was featured in the tutorial before rqt was introduced, it might be popular demand.

[scpeters]

I was just testing a drcsim tutorial that has an rxplot example command with multiple topics. I managed to run the same command using rqt_plot (on groovy) and display multiple topics, but they are all placed in a single plot. So I would say that the issue is not about multiple topics, but rather the lack of subplots.

It's really nice to have the subplots because you can view signals that have different orders of magnitude. If they're all on the same plot, you can only really see the largest one.

[dirk-thomas]

You can create multiple instance of a plugin. Invoke the first plot with whatever topics you want to see in them. You cann than add additional plugin instances to the running rqt instance using:

rqt --command-start-plugin rqt_plot --args ...

Eventually rqt_plot could offer a command line option to achieve the same (with a nicer invocation).

[130s]

Closing. I managed to pass multiple topics as well.

(Indeed there are times, however, I still have to struggle to plot topics. I'll speculate on this and try to clarify if there's anything missing since for many people at my collaborator this seems to be an issue.)