How to add the x, y, z coordinates

Hello. I need your help :frowning:
I tried to input the 'ply file' (3D reconstructed laser scanned data) using R 4.1.3.
The specimen pop up, however, there is no x,y,z coordinates.
The left picture is my result. There is only shown the specimen. And the right picture is the example picture in the lecture file. According to the example, the specimen is shown with the coordinates.

I want to show the coordinates like the example... but I do not know what I should do.

I used this code to load the ply file.


Should I need to add a code for the coordinates? or is there any problem I did?
If you know how to overcome it, please share your knowledge.
Thank you

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