how to plot the real time data into polar plot from arduino in matlab.I wanted to plot magnitudes corresponding to its angles???

The sensor that i am using is giving magnitude and angle.how can i plot that in matlab.

[Nivrutti Mahajan]

hello sir, have u find the answer of this question?

Answer 1

[Leepakshi]

Hi Ayush,

To plot real-time data from an Arduino in a polar plot using MATLAB, you can use the serialport function to read data from the Arduino and polarplot to visualize it.

Following is an example approach:

% Establish connection with Arduino 
arduinoObj = serialport("COM3", 9600); % Ensure the correct COM port and baud rate 

% Prepare the figure for plotting 
figure; 
h = polarplot(0, 0, 'o'); % Initialize a polar plot 
rlim([0 1]); % Set limits for the radial axis 

while true 
    % Read data from Arduino 
    data = readline(arduinoObj); 
    % Assuming data is in the format "magnitude,angle" 
    dataSplit = str2double(split(data, ',')); 
    magnitude = dataSplit(1); 
    angle = deg2rad(dataSplit(2)); % Convert angle to radians 
    
    % Update the polar plot 
    set(h, 'ThetaData', angle, 'RData', magnitude); 
    drawnow; 
end 

% Remember to clear the connection when done 
clear arduinoObj; 

You can refer to the following documentation links for serialport and polarplot functions respectively:

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

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

Hope this helps!