Plotting data coming from serial port with time on X-Axis

Hello! Everyone

I want to plot the temperature data coming from serial port per second and time_stamp it in MATLAB, and display the time information on X-Axis.

The data coming from serial port is in string format and after receiving it, i converted it into double and plotted using MATLAB plot function. But i am not able to understand, that how can i time stamp the received data and mention that time on x-axis.

Currently i created a circular array of 100 values, which will be increased later to show more information. My program is as follow:

% Delete Opened Ports in MATLAB
delete(instrfind)
% Create a Serial Object
ser = serial('COM5', 'BaudRate',9600, 'Timeout',10);

DATA_SIZE = 100;
temperature = zeros(DATA_SIZE, 1);
% timestamp = zeros(DATA_SIZE, 1);
% timestamp = datetime(timestamp, timestamp, timestamp);
% for i = 1:DATA_SIZE
%    timestamp(i) = datetime;
% end
index = 1;

% Open Communication Port
fopen(ser);
while true
    temp = fscanf(ser);
    if size(temp) == [0][0]
        disp 'Timeout Occurs'
        disp 'Check Connections'
        break
    else
        if index < DATA_SIZE
            index = index+1;
        else
            % Reset Subscript Index
            index = 1;
        end
        temperature(index) = str2double(temp);
        % Time Stamp Temperature Values
        % timestamp(index) = datetime;
        % plot(timestamp, temperature, 'LineWidth',2,'Color',[0,0,1.0])
        plot(temperature, 'LineWidth',2,'Color',[0,0,1.0])
        ylim([0,80])
        xlabel('Time \rightarrow')
        ylabel('Temperature (C)\rightarrow');
        title('Real-Time Temperature Plot');
        drawnow
    end
end

fclose(ser);

I tried to plot the time value on X-Axis but failed to get the correct output. Please someone help me regarding this. Any other suggestion are also welcomed. Thanks in advance.

Answer 1

[Walter Roberson]

If you are using R2013b or later then I recommend you use animatedline()

[Arun Sharma]

Thanks for your reply But I am sorry, as i didn't get that, how is this function going to solve my problem, of time stamping the received data and displaying on X-Axis, with timing information.

Yes i am using version greater than R2013b and will try this function, but to me it just looks to make animation of plotting and nothing related to time data on x-axis. Please correct me if i am wrong.