Problem with running a Matlab code.

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.

Answer 1

[Daniel Pollard]

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.

[WAN NOR NAZIRA MUSTAPA KAMAL]

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