about the rqt_pose_view

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hello every one:

I am learning to use rqt_pose_view, but I get some problem , I just follow this website wiki.ros.org/rqt_pose_view to test it ,but there is no change with the pose_view showing , then I used the command rostopic list, but I find nothing about the pose message . Could anyone tell me how to use the pose_view to show the pose of robot or which topic the is subscribed by the rqt_pose_view ?

Thanks