How can you separate incoming serial data?

2013 4 20
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I have incoming serial data from an Arduino board that update continuously. The data is separated by questions marks (?). How would I go about reading the data in MATLAB and separating it into a (12x1) column vector so I can call an index of that vector? I have tried fscanf() but have been unable to get the results I want.
From Arduino:
152?-9?215?-669?2541?1273?-141?27?-452?20.30?97242.00?345.62? ect
delete(instrfind)
s=serial('COM4','BaudRate',9600); %start serial port to arduino
s.ReadAsyncMode = 'continuous';
fopen(s); %open port
while (s.Status == 'open')
C=fscanf(s, '?');
C
if(s.Status ~= 'open')
break;
end
end

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Matthias
Matthias 2013-4-20

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I don't have an Arduino, so I couldn't test it. But how about that:
c_str=regexp(C,'?','split');

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alex korzaniewski
alex korzaniewski 2013-4-20
编辑：alex korzaniewski 2013-4-20
Thank you so much for the quick reply. The code worked perfectly and did exactly what I wanted. I ended up with:
delete(instrfind)
s=serial('COM4','BaudRate',9600); %start serial port to arduino
s.ReadAsyncMode = 'continuous';
fopen(s); %open port
while (s.Status == 'open')
C=fscanf(s);
c_str = regexp(C, '?', 'split')
if(s.Status ~= 'open')
break;
end
end
With this, I was able to get a matrix where I could pull out certain indexes. Ex:
c_str =
Columns 1 through 6
'143' '-10' '216' '-59' '-11' '-206'
Columns 7 through 11
'-133' '-115' '-483' '21.70' '97483.00'
Columns 12 through 13
'324.90' [1x2 char]
c_str(10) =
'21.70'
This is real time data collected from a 10 DOF IMU.
Thanks again for the help!!

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