Where would i denote in the code to have the new files be cut down?? Maybe i need to be a bit clearer in what the code needs to do.

I import a file which contains about 15000 x y z coordinates for a point cloud. I then use this file and run my code to fit a plane to these points and tell me the distance of each point from teh plane. On the second run I take the points and delete any point that is over 128mm from the plane surface, fit a new plane to the new set of points, get the distances, and save the new point cloud file. I then run the program again with the new point cloud file and fit a newer plane to the new points, delete any points over 64mm from the surface of the plane, get distances of newer points, and save the file. I repeat this process untill i get down to deleting points .25mm away. Following is the points in my code where i delete points. Highlighted in red is the spot where the number is changed each time to tell where the cut off point for the points should be:

m_12=1;
for n_12=1 : size(plane2point_12,1);
if abs(plane2point_12(n_12))<64
cull1_12(m_12,=[x_12(n_12) y_12(n_12) z_12(n_12)];
m_12=m_12+1;
end