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Saw your other question, and I think you are misunderstanding the orientation values. This is the format of /initialPose: http://www.ros.org/doc/api/geometry_msgs/html/msg/PoseWithCovarianceStamped.html

The orientation is a quarternion, so it comes with x, y, z, w (The individual values do not represent rotation about that axis eg value of x does not mean rotation about x-axis).

You will need to do a conversion if you need roll, pitch, yaw (rotations about x, y, z axis respectively).

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