how to adjust plot with GUI slider without GUIDE
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I have a plot that is a sound wave and can be played. I am trying to make a slider that will change the values of w, y, b, and z which will change the linspace and then change the sound in real time. So far I have only made a slider that will adjust the W value. For some reason it will not work. I have no error message, but nothing is changing. What could be the possible issue? thanks
here is a sample of my code
figure
c1=uicontrol('style','pushbutton',...;
'position',[100 50 75 600],... ;%[ left right, up down, width, height]
'backgroundcolor','w',...;
'callback',@sound_g,...;
'string','G'),...
function sound_g(~,~)
Fs=6000;
Ts=1/Fs;
w=1000;
y=2000;
b=3000;
z=4000;
a = linspace(.5, 1, w);
d = linspace(1, .5, y );
s = linspace(0.5, 0.1, b );
r = linspace(.1, 0, z);
adsr = [a d s r];
t=[0:length(adsr)-1] ;
fc=392;
y=sin(2*pi*fc*t/Fs);
o=y.*(adsr);
sound(o,Fs)
plot(o)
SliderH = uicontrol('style','slider','position',[175 400 200 20],...
'min', -10000, 'max', 10000);
addlistener(SliderH, 'Value', 'PostSet', @slidercall);
function slidercall(source, eventdata)
end
end
1 个评论
Walter Roberson
2018-6-8
What is LineH and why are you setting its YData?
回答（1 个）
Rik
2018-6-8
You don't use the actual value of the slider, so nothing will change.
function sound_g(hObject,~)
val=get(hObject,'Value');
And why do you create a slider inside the callback?
3 个评论
bella bridges
2018-6-8
Rik
2018-6-8
I still see no indication of where you get the Value from the slider object.
Walter Roberson
2018-6-8
Creating the slider inside the callback is needed for to be able to set its Callback property to a handle to the nested function slidercall . slidercall is deliberately nested because it shares variables with sound_g
Note though that you are creating a new slider in the same position every time you push the button.
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2018-6-8
2018-6-10
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