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how to plot one topic against another in ros

plotting

asked 2013-07-07 15:18:28 -0500

robzz
328 ●14 ●16 ●22

updated 2013-07-07 15:19:19 -0500

I have two topics publishing the std_msgs/Float32 message. Is there a way I can plot the data in one topic against the other?

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answered 2013-07-07 15:30:14 -0500

lindzey
1775 ●18 ●31 ●42

updated 2013-07-09 22:47:38 -0500

Check out rqt_plot.

This provides a scrolling plot of data from multiple topics on the same axis, as a function of time. If you needed topic1 vs topic2, I don't know of an easier solution than writing a quick python node that listens to both topics then plots the data after a specified time.

EDIT: I don't love it (would love another alternative!), but I use matplotlib. The documentation isn't easy to get started with, so I'd just look at the example code and plots in the gallery.

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I've checked out rqt_plot, and as far as I can tell, it can't plot one topic vs. another. What would you use to plot in python?

robzz ( 2013-07-09 21:23:36 -0500 )edit

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answered 2018-01-30 05:43:10 -0500

Davide Faconti
306 ●2 ●12 ●11

There is a way to do that (Called XY plots) in PlotJuggler:

https://facontidavide.github.io/PlotJ...

https://github.com/facontidavide/Plot...

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Some more information about the package would make this answer more useful. That way people don't have to exit the site to find out what it does.

jayess ( 2018-01-30 10:23:43 -0500 )edit

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Asked: 2013-07-07 15:18:28 -0500

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Last updated: Jan 30 '18

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