How to create a counter without using for and while loop.

below is a part of the codes we used in our monitor software for our special project using arduino and power analyzer.

my problem is.. i cannot store all the data sent by the arduino. the counter does not function. it also displays single line array. can someone help me with this. I've been debugging it whole day.

opening GUI function

 handles.counter = 0;

seconnect_callback

 if strcmp(get(hObject,'String'),'CONNECT') % currently disconnected
    serPortn = get(handles.sercomm, 'Value'); % serialport is list of serial ports available
    if serPortn == 1
        errordlg('Select valid COM port');
    else
        serList = get(handles.sercomm,'String'); 
        serPort = serList{serPortn};
        serConn = serial(serPort,'BaudRate',9600,'DataBits',8,'StopBits',1,'FlowControl','none' );
        set(serConn, 'ReadAsyncMode', 'continuous');

        try
            fopen(serConn);
            set(handles.serconnect, 'String','DISCONNECT');
            set(handles.sercomm, 'Enable','off');
            set(serConn, 'BytesAvailableFcn', {@myfunc,handles});

        catch e
            errordlg(e.message);
        end

    end

 else
    set(hObject, 'String','CONNECT');
    set(handles.serconnect, 'BackGroundColor','default');
    set(handles.sercomm, 'Enable','on');
    fclose(serConn);
    msgbox('Saving data to Excel....');

below is oart of my function (there are 4 sets of data, below are just two of them)

 function myfunc(hObject, eventdata, handles)

 global P1 P2 P3 Q1 Q2 Q3 V1 V2 V3 PTnew QTnew VT
 global serConn

 count = 0;
 try

    RxText = fscanf(serConn);
    RxText = strtrim(RxText);
    pause(0.1)

    [id,InRange,power,va,var,pf,volt,current]=strread(RxText,'%s%s%s%s%s%s%s%s','delimiter',',');

        %%%MAIN POWER ANALYZER
        if strcmp(id,'D') %DATA FOR MAIN PA

            %count = count + 1;
            handles.counter = handles.counter + 1;

            %%%%CONVERT STRING TO DOUBLE %%%%%%
            PT= str2double(power);
            QT=str2double(var);
            VT= str2double(volt);

            PTnew = PT - 8.7;
            QTnew = QT - 99.8;

            set(handles.LP4,'String',PTnew);
            set(handles.LQ4,'String',QTnew);
            set(handles.LV4,'String',volt);

            LOAD(handles.counter,:) = [PTnew QTnew VT];
        end

        if strcmp(id,'A') %DATA FOR LOAD 3
            %count = count + 1;
            %handles.counter = handles.counter + 1;
            set(handles.LP3,'String',power);
            set(handles.LQ3,'String',var);
            set(handles.LV3,'String',volt);

            %%%%CONVERT STRING TO DOUBLE %%%%%%
            P3= str2double(power);
            Q3=str2double(var);
            V3= str2double(volt);
            LOAD(handles.counter,:) = [P3 Q3 V3];

        end

 catch e
    disp(e)
 end

Answer 1

[Walter Roberson]

set(serConn, 'BytesAvailableFcn', {@myfunc,gcf});
[...]

function myfunc(hObject, eventdata, thisfig)
handles = guidata(thisfig);
[...]
guidata(thisfig, handles);   %at end of function

[Jovanie Josol]

what does this code do? it will create a counter?