how to extract xyz coordinates from 3d point cloud

My aim is to have a 3D point cloud from kinect xbox360 and then to extract the 3D coordinates (x, y, z) from the cloud as a matrix or in other way in order to send these values(x, y, z) to an arduino kit where i have three servo motors connected one for x, one for y, and one for z. is their anyone can help me in programming or ideas how to make this done!!

Answer 1

[Hassan El Chawich]

i have found the answer for this and it can be done by this code to obtain all the x, y, and z coordinates: x=xyzPoints(:,:,1); y=xyzPoints(:,:,2); z=xyzPoints(:,:,3); points3D=[x(:)';y(:)';z(:)'];

[liu yenfeng]

but i use this code, it has a error "Reference to a cleared variable xyzPoints." do you know why?