rostopic echo is telling me there is a topic gathering data
when I use the exact same topic name I get a message that "header" is non-numeric. Now on the command line display I see the 'value: " and the topic being updated. So I don't know the magic way to name the topic so rqt_plot can magically chop the title information and just get the data. I've tied various forms of appending the 'field" name to the topic without success.
BTW this is on indigo, Ubuntu 14.04.
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