live data plotting in app designer.

I am creating and app which can plot live data from Ultrasonic sensor to UIaxis, I am able to plot the data point with any other shapes like square, circle or star, but not the continues line which I want. can someone help me with this? I am attaching my code.

Answer 1

[Voss]

What you have now is

plot(app.UIAxes,app.t,app.y,'bs');

which plots blue squares at the points given by (app.t,app.y).

If you change it to

plot(app.UIAxes,app.t,app.y,'-bs');

then that would plot blue squares at the points (app.t,app.y) with a solid blue line connecting them.

Or perhaps you want:

plot(app.UIAxes,app.t,app.y,'-b');
% or simply
plot(app.UIAxes,app.t,app.y,'b');

which would plot a solid blue line with no squares (or markers of any kind).

See:

https://www.mathworks.com/help/matlab/ref/plot.html#btzitot_sep_mw_3a76f056-2882-44d7-8e73-c695c0c54ca8

for other line style/marker/color options.

[Dhrumit]

Thank you for response, the issue is it is showing only one data point at a time and that's why I am not able to plot the line. Any sugestion on this?

[Voss]

function StartbuttonButtonPushed(app, event)

app.y = [];
app.t = [];

i = 1;
start = tic();

cla(app.UIAxes,'reset');

app.UIAxes.YLim = [0 20];

while true
    
    app.y(i) = 100 * app.arduino_pinwrite.readDistance();
    app.t(i) = toc(start);
    
    plot(app.UIAxes,app.t,app.y,'-bs');
    
    drawnow();
    
    if app.Stop == true
        break;
    end
    
    i = i+1;
    
end

end

[Dhrumit]

It works now. Thank you for providing me the sollution.

[Dyuman Joshi]

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