juanji2.m

信号处理卷积计算

function varargout = juanji2(varargin)
% JUANJI2 Application M-file for juanji2.fig
%    FIG = JUANJI2 launch juanji2 GUI.
%    JUANJI2('callback_name', ...) invoke the named callback.

% Last Modified by GUIDE v2.0 12-Dec-2003 09:22:05

if nargin == 0  % LAUNCH GUI

	fig = openfig(mfilename,'reuse');

	% Use system color scheme for figure:
	set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));

	% Generate a structure of handles to pass to callbacks, and store it. 
	handles = guihandles(fig);
	guidata(fig, handles);

	if nargout > 0
		varargout{1} = fig;
	end

elseif ischar(varargin{1}) % INVOKE NAMED SUBFUNCTION OR CALLBACK

	try
		if (nargout)
			[varargout{1:nargout}] = feval(varargin{:}); % FEVAL switchyard
		else
			feval(varargin{:}); % FEVAL switchyard
		end
	catch
		disp(lasterr);
	end

end


%| ABOUT CALLBACKS:
%| GUIDE automatically appends subfunction prototypes to this file, and 
%| sets objects' callback properties to call them through the FEVAL 
%| switchyard above. This comment describes that mechanism.
%|
%| Each callback subfunction declaration has the following form:
%| <SUBFUNCTION_NAME>(H, EVENTDATA, HANDLES, VARARGIN)
%|
%| The subfunction name is composed using the object's Tag and the 
%| callback type separated by '_', e.g. 'slider2_Callback',
%| 'figure1_CloseRequestFcn', 'axis1_ButtondownFcn'.
%|
%| H is the callback object's handle (obtained using GCBO).
%|
%| EVENTDATA is empty, but reserved for future use.
%|
%| HANDLES is a structure containing handles of components in GUI using
%| tags as fieldnames, e.g. handles.figure1, handles.slider2. This
%| structure is created at GUI startup using GUIHANDLES and stored in
%| the figure's application data using GUIDATA. A copy of the structure
%| is passed to each callback.  You can store additional information in
%| this structure at GUI startup, and you can change the structure
%| during callbacks.  Call guidata(h, handles) after changing your
%| copy to replace the stored original so that subsequent callbacks see
%| the updates. Type "help guihandles" and "help guidata" for more
%| information.
%|
%| VARARGIN contains any extra arguments you have passed to the
%| callback. Specify the extra arguments by editing the callback
%| property in the inspector. By default, GUIDE sets the property to:
%| <MFILENAME>('<SUBFUNCTION_NAME>', gcbo, [], guidata(gcbo))
%| Add any extra arguments after the last argument, before the final
%| closing parenthesis.



% --------------------------------------------------------------------
function varargout = pushbutton1_Callback(h, eventdata, handles, varargin)

t=-6:5;
x1=[1,1,1,1,0,0,1,1,1,1,0,0];
l1=length(x1);
x2=[0,1,2,1,0,0,0,1,2,1,0,0];
l2=length(x2);
lmax=max(l1,l2);
dt=0.5;
    hf=fliplr(x2);
    y=zeros(1,3*lmax);
    axes(handles.axes4);
    hold off;
    for k=-6:6
        p=[hf(end),hf(1:end-1)];
        y1=x1.*p*dt;					
        yk=sum(y1);					
        y(k+lmax+1)=yk;
        axes(handles.axes1);
        t1=-0.2;t2=5.8;
        y=0:0.2:2;
        plot(t1,y,'r',t2,y,'r');hold on
        ylabel('x1');
        stem(t,x1);
        axis([-6,6,0,2]);
        axes(handles.axes2);
        t3=-0.2;t4=5.8;
        y3=0:0.2:2;
        plot(t3,y3,'r',t4,y3,'r');hold on
        stem(t,p);axis([-6,6,0,2]);hold off
        ylabel('x2(m-k)');
        axes(handles.axes3);
        t5=-0.2;t6=5.8;
        y4=0:0.2:2;
        plot(t5,y4,'r',t6,y4,'r');hold on
        stem(t,y1);axis([-6,6,0,2]);hold off
       ylabel('s=x1.*x2(m-k)');
        axes(handles.axes4);
        t7=-0.2;t8=5.8;
        y6=0:0.2:5;
        plot(t7,y6,'r',t8,y6,'r');hold on
        ylabel('y(k)=sum(s)*dt');
        stem(k,yk);axis([-6,6,0,5]);hold on 
        drawnow;
        pause(1);
         hf = p;
    end