[ros-users] Error with Twist message when used with rosoct

Eric Perko wisesage5001 at gmail.com
Fri May 14 06:52:44 UTC 2010

Hey all,

I'm trying to get some prototyping code working using the ROS
interface (latest tag) for Octave, but I've encountered a problem with
the Twist message. First, here is the specific error text when running
the attached source:

octave:1> publish_vel
ans =  1
parse error near line 32 of file

  syntax error

>>> x = [    '# This expresses velocity in free space broken into it's linear and angular parts. \n' ...


error: error creating function handle "@geometry_msgs_Twist"
error: evaluating argument list element number 2
error: evaluating assignment expression near line 5, column 9
error: near line 5 of file `/home/eric/Downloads/publish_vel.m'

I do have my .octaverc all setup properly.

If I edit the Twist.m file and remove the apostrophe from it's, the
attached code runs just fine. It seems that the apostrophes need to be
escaped or replaced or something.

Also, the grammar in that comment in Twist.msg is wrong - it's should
be its anyways :)

- Eric
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