frequency shift slider in real time

i have the following code that reads an audio file, adds a frequency (the bold line) to the file and plots it , my question is the value of the added frequency comes from a slider (changingvalue), after changing the value the plot is plotted , how can i plot as im changing the value kinda like in real time.

changingValue = event.Value;

app.RPMGauge_2.Value = changingValue;

sample = 44100;

[y,Fs] = audioread("Sound and 1000 new.wav");

dt = 1/sample;

StopTime = 20;

Nsamps = length(y);

t = (1/sample)*(1:Nsamps);

A = 0.017;

xfreq = A*sin(2*pi*changingValue*t);

xfreq(t>StopTime) = 0;

xfreq = xfreq';

mix = y + xfreq;

y_fft = abs(fft(mix));

y_fft = y_fft(1:Nsamps/2);

f = Fs*(0:Nsamps/2-1)/Nsamps;

axes(app.axes3);

plot(f, y_fft)

xlim([0 5000])

ylim([0 9000])

Answer 1

[rumin diao]

if you add a slider in appdesigner:

you can get the current slider number by "app.Slider.Value" . "app.Slider" is the name and "Value" is the property.

you can see: Slider Properties for more information.

[Mohamed Turkmani]

you clearly didint read my question, i dont have any problems with slider my problem is when changing its value i want the plot to change in real time

[rumin diao]

same, add a plot in the callback function:

% Value changed function: aSlider
function aSliderValueChanged(app, event)
    value = app.aSlider.Value;
    plot(app.UIAxes,value);%app.UIAxes is where you want to plot, in your code is app.axes3 maybe.
end