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Oddity in rxplot

asked 2013-04-07 19:07:58 -0600

Rizqa gravatar image

updated 2013-04-07 23:02:44 -0600

130s gravatar image


I try to "rxplot" but the rxplot does not show anything in window.. I have made "rostopic echo /kirim_ke_servo" to see the data

name: ['joint1', 'joint2', 'joint3']

position: [-0.6512382961093546, -0.19887827975841985, 1.568777172497011]

velocity: [0.5, 0.5, 0.5]

So, I try to "rxplot /kirim_ke_servo/position" in terminal

rizqa@ubuntu:~$ rxplot /kirim_ke_servo/position

[/kirim_ke_servo/position] value was not numeric: (-0.8225104223257155, -0.07641244134696615, 1.755642665868377)

In terminal appear the data.. but rxplot does not display anything How fix the problem ?

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answered 2013-04-07 21:45:18 -0600

rxplot can only plot numeric values. The "/kirim_ke_servo/position" argument you are using is an array of numeric values, hence rxplot complains. Off the top of my head,

rxplot /kirim_ke_servo/position[0]

should work. This way, the argument points to the first numeric_value in the array. You can of course also plot multiple values simultaneously as described on the rxplot wiki page. There's also rqt_plot, last time I checked it didn't work with array values like yours though (might have changed now).

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nice... ^_^ it works.. thanks @Stefan Kohlbrecher

Rizqa gravatar image Rizqa  ( 2013-04-08 03:07:33 -0600 )edit

@Stefan Kohlbrecher See my answer for array plot.

130s gravatar image 130s  ( 2013-08-07 20:51:51 -0600 )edit

answered 2013-04-07 23:07:13 -0600

130s gravatar image

updated 2013-08-07 20:51:06 -0600

As in @Stefan Kohlbrecher's answer, there's rqt_plot that supersedes rxplot (in fact, all rx tools are succeeded by rqt). Please open an enhancement request ticket here if you think it's useful to many users.

Update) rqt_plot does accept brancket to identify elements in the array.image description

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okay.. thanks @Isaac Saito ^_^

Rizqa gravatar image Rizqa  ( 2013-04-08 03:08:35 -0600 )edit

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Asked: 2013-04-07 19:07:58 -0600

Seen: 4,822 times

Last updated: Aug 07 '13