Error in Understanding ROS Topics Tutorial [closed]
I did a quick search and didn't see this reported.
http://wiki.ros.org/ROS/Tutorials/Und...
For the Hydro and later case, it looks like there is a missing negative sign for the angular velocity when attempting to get the turtle to continuously move in a circle. I've highlighted this below. I haven't actually run this code, but I'm pretty sure that was a mistake since it is the same thing run earlier in the tutorial and the image shows it turn the opposite direction.
For ROS Hydro and later,
$ rostopic pub /turtle1/cmd_vel geometry_msgs/Twist -r 1 -- '[2.0, 0.0, 0.0]' '[0.0, 0.0, 1.8]'
For ROS Groovy and earlier,
$ rostopic pub /turtle1/command_velocity turtlesim/Velocity -r 1 -- 2.0 -1.8
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