Problem with running a Matlab code.

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WAN NOR NAZIRA MUSTAPA KAMAL
评论： WAN NOR NAZIRA MUSTAPA KAMAL 2021-1-21
I am having problem with the code where when I first run the code, the outcome that I get is data in values and graph but when I want to re run the code for the second time and so on, the outcome that I get is zero data values and the graph is in straight line. I am using MATLAB R2019a.Can you please help me to solve this problem.

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Daniel Pollard
Daniel Pollard 2021-1-21
Clear your variables by putting the command
clear
at the start of your programme. It's almost certainly holding onto variables which affects repeated runs.
  1 个评论
WAN NOR NAZIRA MUSTAPA KAMAL
WAN NOR NAZIRA MUSTAPA KAMAL 2021-1-21
I have already do it but it still give the same results when I re run the codes. This is the codes:
%% setup
hold all
a = arduino('COM3', 'Uno');
mpu = i2cdev(a,'0x68'); %mpu adress is normally 0x68
writeRegister(mpu, hex2dec('B6'), hex2dec('00'), 'int16'); %reset
data = zeros(10000,14,'int8'); %prelocating for the speed
j = 1;
a1 = animatedline('Color',[1 0 0]);
a2 = animatedline('Color',[0 1 0]);
a3 = animatedline('Color',[0 0 1]);
legend('Accel_x','Accel_y','Accel_z')
%% loop
while(true)
x=1;
for i=59:72 % 14 Data Registers for Accel,Temp,Gyro
data(j,x) = readRegister(mpu, i, 'int8');
x = x + 1;
end
y = swapbytes(typecast(data(j,:), 'int16')) %if your system is big-endian remove the swapbytes function
addpoints(a1,j,double(y(1)));
addpoints(a2,j,double(y(2)));
addpoints(a3,j,double(y(3)));
j = j+1;
drawnow limitrate
end

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