function hh
N=800;
M=600;
A = 0; F = 0; S = 0; Fi=0;
Fs=100;
Ts=1/Fs;
t=[-6:Ts:6];
handles.fig=figure();
mpos=get(handles.fig,'position');
set(handles.fig,'units','pixel');
set(handles.fig,'position',[mpos(3)-120 mpos(4)-250 N M]);
handles.axes1=axes();
set(handles.axes1,'units','pixel');
handles.axes1=subplot(3,1,1);
handles.axes2=axes();
set(handles.axes2,'units','pixel');
handles.axes2=subplot(3,1,2);
handles.axes3=axes();
set(handles.axes3,'units','pixel');
handles.axes3=subplot(3,1,3);
handles.filter1=uicontrol('style','radiobutton');
set(handles.filter1,'string','low pass');
set(handles.filter1,'position',[100 200 80 20]);
handles.filter2=uicontrol('style','radiobutton');
set(handles.filter2,'string','highpass');
set(handles.filter2,'position',[100 180 80 20]);
handles.filter3=uicontrol('style','radiobutton');
set(handles.filter3,'string','band pass');
set(handles.filter3,'position',[100 160 80 20]);
handles.edit1=uicontrol('style','edit');
set(handles.edit1,'position',[N-360 0 120 20]);
set(handles.edit1,'string','A');
set(handles.edit1,'horizontalalignment','center');
set(handles.filter1,'callback',{@mycallback, handles, 1});
set(handles.filter2,'callback',{@mycallback, handles, 2});
set(handles.filter3,'callback',{@mycallback, handles, 3});
handles.edit1 = uicontrol('style','edit');
set(handles.edit1,'position',[N-360 0 120 20]);
set(handles.edit1,'string','A');
set(handles.edit1,'horizontalalignment','center');
handles.edit2 = uicontrol('style','edit');
set(handles.edit2,'position',[N-240 0 120 20]);
set(handles.edit2,'string','F');
set(handles.edit2,'horizontalalignment','center');
set(handles.edit1, 'callback', @edit_callback1);
set(handles.edit2, 'callback', @edit_callback2);
function edit_callback1(src, event_data)
A = str2double( get(src, 'String') );
end
function edit_callback2(src, event_data)
F = str2double( get(src, 'String') );
S=A*cos(2*pi*F*t);
plot(handles.axes1, t, S);
end
function mycallback(gcf, event_data, handles, filter_num)
switch filter_num
case 1
set(handles.filter1,'value',1);
set(handles.filter2,'value',0);
set(handles.filter3,'value',0);
Fi=rectpuls(t/4);
plot(handles.axes2,t,Fi);
axis(handles.axes2, [-6 6 0.01 2]);
xlabel(handles.axes2,'frequency(hz)');
ylabel(handles.axes2,'Filter');
title(handles.axes2,'Low Pass Filter impulse');
plot(handles.axes3, t, (Fi*S));
case 2
set(handles.filter1,'value',0);
set(handles.filter2,'value',1);
set(handles.filter3,'value',0);
Fi=1*(t>3)+1*(t<(-3));
plot(handles.axes2,t,Fi);
axis(handles.axes2, [-6 6 0.01 2]);
xlabel(handles.axes2,'frequency(hz)');
ylabel(handles.axes2,'Filter');
title(handles.axes2,'High Pass Filter impulse');
plot(handles.axes3, t,(Fi*S));
case 3
set(handles.filter1,'value',0);
set(handles.filter2,'value',0);
set(handles.filter3,'value',1);
Fi=1*(t>2&t<4)+1*(t<(-2)&t>-4);
plot(handles.axes2,t,Fi);
axis(handles.axes2, [-6 6 0.01 2]);
xlabel(handles.axes2, 'frequency(hz)');
ylabel(handles.axes2,'Filter');
title(handles.axes2, 'Band Pass Filter frequency');
plot(handles.axes3, t, (Fi*S));
end
end
end
