How can I change this code to get the line when plotting the graph? Because I tried adding commands related but still there is no line when I am running the codes

function [] = i2c_sensor()
  a = arduino('COM3', 'UNO');
  imu = mpu6050(a,'SampleRate',50,'SamplesPerRead',10,'ReadMode','Latest');
  for i=1:10
    accelReadings(i,:) = readAcceleration(imu);
    display(accelReadings(i,:));
    pause(1);
  
    xlabel('Time (s)');
    ylabel('Acceleration (m/s^2)');
    title('Acceleration values from mpu6050');
    x_val = animatedline('Color','r');
    y_val = animatedline('Color','g');
    z_val = animatedline('Color','b');
  end
end

Answer 1

[dpb]

You're creating a new animatedline object every time, not adding points to the ones intended...that's not how the examples in the documentation show using it.

function [] = i2c_sensor()
  a = arduino('COM3', 'UNO');
  imu = mpu6050(a,'SampleRate',50,'SamplesPerRead',10,'ReadMode','Latest');
  xlabel('Time (s)');
  ylabel('Acceleration (m/s^2)');
  title('Acceleration values from mpu6050');
  hx_val = animatedline('Color','r');
  hy_val = animatedline('Color','g');
  hz_val = animatedline('Color','b');
  for i=1:10
    accelReadings(i,:) = readAcceleration(imu);
    t(i)=????           
    display(accelReadings(i,:));
    addpoints(hx_val(t(i),accelReadings(i,1));
    addpoints(hy_val(t(i),accelReadings(i,2));
    addpoints(hz_val(t(i),accelReadings(i,3));
    drawnow
    pause(1);
  end
end

ASSUMPTIONS:

1. x,y,z components of acceleration are in a 3-vector returned from the readAcceleration routine,
2. can return the sample time for each reading in some manner into variable t which is needed for an abscissa plotting location by addpoints

Read the documentation for both animatedline and addpoints and look at all the examples carefully for further enhancements in using.

[WAN NOR NAZIRA MUSTAPA KAMAL]

Thank you. But I put 10 for the value of t, but when I am running the code there is an error of "Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters"

[Walter Roberson]

    addpoints(hx_val, t(i),accelReadings(i,1));
    addpoints(hy_val, t(i),accelReadings(i,2));
    addpoints(hz_val, t(i),accelReadings(i,3));

[WAN NOR NAZIRA MUSTAPA KAMAL]

allright, thank you!