Need help with storing live data from sensors into array
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Samuel Louise
on 29 Dec 2018
Commented: Samuel Louise
on 4 Feb 2019
this is my code. I want to store the incoming data into my array/matrix whichever would do the trick. This keeps overwriting the previous data into the array. I want the data to be added up at the bottom.
I am also getting this problem. "Conversion to cell from uint16 is not possible."
iterate = 0;
while 1
iterate =plus(iterate, 1); %counter
disp(iterate);
Gyro_X = readRegister(MPU9250, GYRO_XOUT_H, 'uint16')
Gyro_Y = readRegister(MPU9250, GYRO_YOUT_H, 'uint16')
Gyro_Z = readRegister(MPU9250, GYRO_ZOUT_H, 'uint16')
pause(1/10);
%Gyro = table(iterate, Gyro_X, Gyro_Y, Gyro_Z);
Gyro = {};
Gyro(i) = [ iterate, Gyro_X, Gyro_Y, Gyro_Z];
end
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Accepted Answer
Mustafa Abu-Mallouh
on 30 Dec 2018
Edited: Mustafa Abu-Mallouh
on 30 Dec 2018
If you want to store the values in each row, call out that you want the values to take over all columns of "Gyro". See below:
i = 0;
max_data_len = 10;
% Initialize 'Gyro' with desired dimensions
% - Don't have to but it helps performance
Gyro = zeros( max_data_len , 4 );
while i < max_data_len
i = i+1;
Gyro_X = randi(30,1);
Gyro_Y = randi(30,1);
Gyro_Z = randi(30,1);
% If creating a results array
Gyro(i,:) = [i Gyro_X Gyro_Y Gyro_Z];
end
Another issue is you redefine "Gyro" as an empty cell array every iteration of the loop when you call the following code:
Gyro = {};
This clears the data you originally had stored in the variable. This is also the reason you are getting the "Conversion to cell from uint16 is not possible" error; it is trying to convert your 16 bit integer array into a cell array
More Answers (1)
ahmed nebli
on 29 Dec 2018
Edited: madhan ravi
on 29 Dec 2018
what you need to do is create a vector/matri without defining its size first (e.g.: A=[]; ) then use the command vertcat.
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