You can update your plot every time new data is read to get the live scope.You can write your own code or use some examples like below :

http://in.mathworks.com/matlabcentral/fileexchange/14397-real-time-scope-display--simple-script-

Dear Fajar,

I am not sure how arduino interacts with MATLAB. Anyways, you can make a "for" loop and read the data and update the figure each duration T millisecond. You have to use "pause" command inside the loop to wait for T milliseconds. Overwriting the plot without pausing will not work.

Second option, you can use the mouse effect (call file when you please the mouse on the graph), but I do not recommend it.

I think its pretty easy to implement script which is capable of doing what you want.

I assume that the data from your sensors is transmitted in real-time, so you can have a counter associated with time and plot each sample while holding the figure.

Here is a simple example:

%assume that your plot for 40 frames of time (here time could be in the unit

% represented by your device or sensors

t = 0;

figure;  % create a figure

hold on;  % turn hold on

while(1)

% receive sensor data

plot(t, sensorData, 'o');

t = t+1;

if(t >40)

t = 0;

clf;  %clear figure

hold on; % again hold on after clearing

end

end % whileloop

The above example is highly simplified with the core idea of displaying real-time data. you can further modify this according to your scenarios and requirements.

You can scope in Simulink. If you used Serial.write(SensorValue); in your Arduino sketch it sends your data to serial COM port and you can use serial "Serial Configuration" and "Serial Receive" block to get sersor values in simulink. 

Check the attachment.