What can I add in this code for me to plot the data that I obtained in real time graph?

function [] = i2c_sensor()

a = arduino('COM3', 'UNO');

imu = mpu6050(a,'SampleRate',50,'SamplesPerRead',10,'ReadMode','Latest');

for i=1:10

accelReadings = readAcceleration(imu);

display(accelReadings);

pause(1);

end

end

Answer 1

[Swastik Sarkar]

Hi @WAN NOR NAZIRA MUSTAPA KAMAL,

To plot real-time data from the sensor in MATLAB, the animatedline function can be used to dynamically update the graph as new data is read. Below is an example of how to implement this (using random values for acceleration):

figure;
hold on;
grid on;
title('Simulated Real-Time Acceleration Data');
xlabel('Time (s)');
ylabel('Acceleration (m/s^2)');
hX = animatedline('Color', 'r', 'DisplayName', 'X');
hY = animatedline('Color', 'g', 'DisplayName', 'Y');
hZ = animatedline('Color', 'b', 'DisplayName', 'Z');
legend;

startTime = datetime('now');

for i = 1:100
    accelReadings = readAcceleration();
    t = datetime('now') - startTime;
    t = seconds(t);

    addpoints(hX, t, accelReadings.X);
    addpoints(hY, t, accelReadings.Y);
    addpoints(hZ, t, accelReadings.Z);

    drawnow;
    pause(0.1);
end

●

function accel = readAcceleration()
    
    accel.X = 2 * rand() - 1;
    accel.Y = 2 * rand() + 1;
    accel.Z = 2 * rand() + 3;
end

For more information on animatedLine, refer to the following documentation:

https://www.mathworks.com/help/matlab/ref/animatedline.html

Hope this helps measure and plot as and when data is available.