Store data into an Array or variable

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BELOW is a part of my codes. ARDUNIO - MATLAB.
PROBLEM: I want to store all values of P, Q and V in every update of the loop so that it would now be easy for me to print it to excel using xlswrite.
CAN SOMEONE HELP ME WITH THIS. Or any alternative to store the data for DATA ACQUISITION FOR MY STUDY. your answers are a great help.
while strcmp(start,'DISCONNECT')
RxText = fscanf(serConn);
RxText = strtrim(RxText);
disp(RxText);
pause(0.5)
%%%%%%%for data acquisition
handles.counter = handles.counter + 1;
[InRange,power,va,var,pf,volt,current,id]=strread(RxText,'%s%s%s%s%s%s%s%s','delimiter',',');
%%%MAIN POWER ANALYZER
if strcmp(id,'B') %DATA FOR MAIN PA
set(handles.LP4,'String',power);
set(handles.LQ4,'String',var);
set(handles.LV4,'String',volt);
%%%%CONVERT STRING TO DOUBLE %%%%%%
P4= str2double(power);
Q4 = str2double(var);
V4 = str2double(volt);
%%%%CONDITION SET TO LOAD MAIN STAT
if P4>70 && P4<80
set(handles.STAT4,'String','WARNING');
elseif P4>80
set(handles.STAT4,'string','SYSTEM OVERLOAD');
else
set(handles.STAT4,'string','NORMAL');
end
%%%%%DATA ACQUISITION %%%%%
P4(handles.counter,1) = P4
%Q4(handles.counter,2) = Q4;
%V4(handles.counter,3) = V4;
% data = [P1 Q1 V1]
end

Accepted Answer

Walter Roberson
Walter Roberson on 5 Mar 2013
count = 0; %before loop
Inside the loop,
count = count + 1;
data(count, :) = [P1 Q1 V1];
  2 Comments
Jovanie Josol
Jovanie Josol on 5 Mar 2013
I HAVE A PROBLEM ENCOUNTERED. the data that will be stored will have zero. 3 zeros. I used 4 Power analyzers and used multiplexing. so i think y the zeros exist. HOW CAN I OMIT THE ZEROS??
data =
0 0 0
7.2000 84.3000 212.9900
0 0 0
0 0 0
0 0 0
7.2000 84.3000 212.9100
0 0 0
0 0 0
0 0 0
7.2000 84.3000 212.8600
0 0 0
0 0 0
0 0 0
7.2000 84.8000 213.1800

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More Answers (1)

Jovanie Josol
Jovanie Josol on 5 Mar 2013
Got it! I put the code data(count,:) = [P1 P2 P3 P4] outside the if end condition. then what
P1 = get(handles.LP1,'string');
P2 = get(handles.LP2,'string');
P3 = get(handles.LP3,'string');
P4 = get(handles.LP4,'string');
P1=str2double(P1);
P2=str2double(P2);
P3=str2double(P3);
P4=str2double(P4);
data(count,:) = [P1 P2 P3 P4]

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