How to store data from every cycle in while a loop?

Hello,

i'm trying to extract point data from slices taken from a point cloud. ptCloudSegmented contains the x,y,z of every point of the slice.

I wrote this code:

 ptCloud=pcread('1_no_OK.ply');  %this is the whole point cloud 

zLim=[0,0.5];  %section interval
while zLim < ptCloud.ZLimits (2)
    zIdx = ptCloud.Location(:,3)>=zLim(1) & ptCloud.Location(:,3)<=zLim(2); 
    ptCloudSegmented = ptCloud.Location(zIdx,:);
    ptCloudSegmented = double(ptCloudSegmented);  % this is what i'm trying to save into a matrix in every cycle
    zLim=zLim+0.5;


 end

The problem is that every time the cycle restarts the ptCloudSegmented is overwritten by the new section of points. So i'm trying to insert a structure containing more instances of ptCloudSegmented, added dynamically, but i red that using dynamic variables makes the code a bit unstable. There's a way to solve this issue? Thanks in advice

Answer 1

[KSSV]

 ptCloud=pcread('1_no_OK.ply');  %this is the whole point cloud 

zLim=[0,0.5];  %section interval
ptCloudSegmented = cell([],1) ; 
count = 0 ; 
while zLim < ptCloud.ZLimits (2)
    count = count+1 ; 
    zIdx = ptCloud.Location(:,3)>=zLim(1) & ptCloud.Location(:,3)<=zLim(2);     
    ptCloudSegmented{count} = double(ptCloud.Location(zIdx,:));  
    zLim=zLim+0.5;
 end

[Francesco Belluccini]

Thanks a lot