how to sort extracted points in a structure made from cells

What I did

hi, I have reported here a script capable of loading a g code file of text, containing the coordinates of the X Y Z E positions of the extruder of a 3d printer. In this file the various layers to be deposited are indicated with the words; LAYER :, followed by the number of the layer considered. the script then counts the various layers and obtains the various positions X Y Z E using the GETPOSITION function for the command lines (contained in the g code) under the captions; MESH: e; TYPE.

clear all
clc

[FileName,PathName,FilterIndex] = uigetfile({'*.gcode';'*.txt'},'Select Gcode to modify');
filename=strcat(PathName,FileName);
comando=strcat('fidR=fopen(''',filename,'''',');');
eval(comando);
% 
% C=strsplit(FileName,'.');
% filename=strcat(PathName,C{1},'-modified.',C{2});
% comando3=strcat('fidW=fopen(''',filename,'''',',''','wt',''');');
% 
% eval(comando3)

command=fgets(fidR);
command=strtrim(command);
PREV_POS=[0,0,0,0];
LayerCount=0; %contatore dei Layer
Part_Name=[];
Line_Type=[];

while ischar(command)
    display(command);
    
[NEW_POS]=GETPOSITION(PREV_POS,command);
 
% display(PREV_POS);
% display(NEW_POS);


if contains(command,';LAYER:')
    LayerCount=LayerCount+1;
    disp('inizio un nuovo layer!')
end

if contains(command,';MESH:')
    Part_Name=split(command,":");
    Part_Name=Part_Name{2,1};
    Part_Name=split(Part_Name,".");
    Part_Name=Part_Name{1,1};
    if contains(Part_Name,'NONMESH')
        Part_Name=[];
        Line_Type=[];
    end
    
    
    if not(isempty(Part_Name)) %se Part_Name è non vuoto, devo creare la variabile nominata solo se non è già stata creata
str=strcat('ExCheck=exist(''',Part_Name,''');');
eval(str);

if ExCheck~=1
    str=strcat(Part_Name,'=[];');
    eval(str);
    disp('NEW VARIABLE CREATED');
end
       pause 
    end
end

if contains(command,';TYPE:')
    if contains(command,'WALL-INNER')
        Line_Type='WALL-INNER';
        
    end
    
    if contains(command,'WALL-OUTER')
        Line_Type='WALL-OUTER';
        
    end
    
    if contains(command,'SKIN')
        Line_Type='INFILL';
        
    end

end







disp('Layer number')
disp(LayerCount);
disp('Previous Position')
disp(PREV_POS);
disp('Part being fabricated')
disp(Part_Name)
disp('Line Type')
disp(Line_Type);
disp('Target position')
disp(NEW_POS);




clc
PREV_POS=NEW_POS;
command=fgets(fidR);
command=strtrim(command);
end

What I have to do

what I have to do is sort the points extracted from the G-Code in a structure composed of cells. The transition from one layer to the next is indicated with the string; LAYER: followed by the layer number starting from 0