mingba.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

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

% Last Modified by GUIDE v2.0 14-Mar-2003 06:14:40

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 = edit1_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit2_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit3_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit4_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit5_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit6_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit7_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit8_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit9_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit10_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit11_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit14_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit15_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit16_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit17_Callback(h, eventdata, handles, varargin)




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




% --------------------------------------------------------------------
function varargout = pushbutton2_Callback(h, eventdata, handles, varargin)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%
if ~isempty(get(handles.edit2,'String'))
    f2 = str2double(get(handles.edit2,'String'));
    %else warndlg('x2系数不能为零或空');
end

%zlim的获取
clear f18 f19;
f18 = str2double(get(handles.edit18,'String'));
f19 = str2double(get(handles.edit19,'String'));
if f18>=f19
    errordlg('Z的最大值不能小于Z的最小值！','有错就改');
end


%设定slider初值
slider_step(1) = 0.1/(f19-f18);
slider_step(2) = 1/(f19-f18);
av=f18+(f19-f18)/2;
set(handles.slider1,'sliderstep',slider_step,...
      'max',f19,'min',f18,'Value',av);
  
%refresh the edit text
z=get(handles.slider1,'Value');
set(handles.edit20,'string',sprintf('%1.4g\',z));


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
f4 = str2double(get(handles.edit4,'String'));

if ~isempty(get(handles.edit5,'String'))
    f5 = str2double(get(handles.edit5,'String'));
else f5=0;
end

f6 = str2double(get(handles.edit6,'String'));
   
if ~isempty(get(handles.edit7,'String'))
    f7 = str2double(get(handles.edit7,'String'));
else f7=0;
end

f8 = str2double(get(handles.edit8,'String'));

if ~isempty(get(handles.edit9,'String'))
    f9 = str2double(get(handles.edit9,'String'));
else f9=0;
end


f10 = str2double(get(handles.edit10,'String'));


if ~isempty(get(handles.edit11,'String'))
    f11 = str2double(get(handles.edit11,'String'));
else f11=0;
end

f12 = str2double(get(handles.edit12,'String'));
f13 = str2double(get(handles.edit13,'String'));
f14 = str2double(get(handles.edit14,'String'));
f15 = str2double(get(handles.edit15,'String'));

f16 = str2double(get(handles.edit16,'String'));
f17 = str2double(get(handles.edit17,'String'));

n=1000;
x1=linspace(f16,f17,n);one=ones(1,n);
hold on;


plot(x1,f4*x1+f5,'b');
plot(x1,f6*x1+f7,'g');
plot(x1,f8*x1+f9,'r');
plot(x1,f10*x1+f11,'c');

%ylim
y1=max([f4*f17+f5,f4*f16+f5,f6*f17+f7,f6*f16+f7,f8*f17+f9,...
    f8*f16+f9,f10*f17+f11,f10*f16+f11,f15,f16]);
y2=min([f4*f17+f5,f4*f16+f5,f6*f17+f7,f6*f16+f7,f8*f17+f9,...
    f8*f16+f9,f10*f17+f11,f10*f16+f11,f14,f17]);

plot(f12*one,linspace(y1,y2,n),'k');
plot(f13*one,linspace(y1,y2,n),'k');
plot(x1,f14*one,'k');
plot(x1,f15*one,'k');

hold off;



% --------------------------------------------------------------------
function varargout = pushbutton3_Callback(h, eventdata, handles, varargin)
cla;



% --------------------------------------------------------------------
function varargout = togglebutton2_Callback(h, eventdata, handles, varargin)
hold on;




% --------------------------------------------------------------------
function varargout = pushbutton5_Callback(h, eventdata, handles, varargin)
hold on;



% --------------------------------------------------------------------
function varargout = pushbutton6_Callback(h, eventdata, handles, varargin)
hold off;



% --------------------------------------------------------------------
function varargout = pushbutton7_Callback(h, eventdata, handles, varargin)
grid off;




% --------------------------------------------------------------------
function varargout = edit18_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit19_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit20_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit21_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = slider1_Callback(h, eventdata, handles, varargin)

%zlim的获取
clear f18 f19;
f18 = str2double(get(handles.edit18,'String'));
f19 = str2double(get(handles.edit19,'String'));
if f18>=f19
    warndlg('Z的最大值不能小于Z的最小值！','这可是常识啊！');
end


%设定slider初值
slider_step(1) = 0.1/(f19-f18);
slider_step(2) = 1/(f19-f18);
set(handles.slider1,'sliderstep',slider_step,...
      'max',f19,'min',f18);
  
%目标函数系数的获取
z=get(handles.slider1,'Value');
if ~isempty(get(handles.edit1,'String'))
    f1 = str2double(get(handles.edit1,'String'));
else f1=0;
end

if ~isempty(get(handles.edit2,'String'))
    f2 = str2double(get(handles.edit2,'String'));
    %else errordlg('x2系数不能为零或空','下次可别忘了！');
end

if ~isempty(get(handles.edit3,'String'))
    f3 = str2double(get(handles.edit3,'String'));
else f3=0;
end
%axis 上xlim
f16 = str2double(get(handles.edit16,'String'));
f17 = str2double(get(handles.edit17,'String'));

%line of the aim function
n=1000;
x1=linspace(f16,f17,n);one=x1.*zeros(1,n)+1;

hold on;
try 
    plot(x1,(z-f1*x1-f3)/(f2),'r');
catch
    errordlg('x2系数不能为零或空','下次可别忘了！');
end
hold off

%refresh the edit text
set(handles.edit20,'string',sprintf('%1.2g\',z));



% --------------------------------------------------------------------
function varargout = pushbutton8_Callback(h, eventdata, handles, varargin)
zoom on;




% --------------------------------------------------------------------
function varargout = pushbutton9_Callback(h, eventdata, handles, varargin)
zoom off;



% --------------------------------------------------------------------
function varargout = pushbutton10_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = pushbutton11_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit22_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit23_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit25_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit26_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit27_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = edit28_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = pushbutton12_Callback(h, eventdata, handles, varargin)

%get the variables' value
f4 = str2double(get(handles.edit4,'String'));

if ~isempty(get(handles.edit5,'String'))
    f5 = str2double(get(handles.edit5,'String'));
else f5=0;
end

f6 = str2double(get(handles.edit6,'String'));
   
if ~isempty(get(handles.edit7,'String'))
    f7 = str2double(get(handles.edit7,'String'));
else f7=0;
end

f8 = str2double(get(handles.edit8,'String'));

if ~isempty(get(handles.edit9,'String'))
    f9 = str2double(get(handles.edit9,'String'));
else f9=0;
end


f10 = str2double(get(handles.edit10,'String'));


if ~isempty(get(handles.edit11,'String'))
    f11 = str2double(get(handles.edit11,'String'));
else f11=0;
end

f12 = str2double(get(handles.edit12,'String'));
f13 = str2double(get(handles.edit13,'String'));
f14 = str2double(get(handles.edit14,'String'));
f15 = str2double(get(handles.edit15,'String'));

f16 = str2double(get(handles.edit16,'String'));
f17 = str2double(get(handles.edit17,'String'));

n=1000;
x1=linspace(f16,f17,n);one=ones(1,n);


y1=max([f4*f17+f5,f4*f16+f5,f6*f17+f7,f6*f16+f7,f8*f17+f9,...
    f8*f16+f9,f10*f17+f11,f10*f16+f11,f15,f16]);
y2=min([f4*f17+f5,f4*f16+f5,f6*f17+f7,f6*f16+f7,f8*f17+f9,...
    f8*f16+f9,f10*f17+f11,f10*f16+f11,f14,f17]);

%xlim,ylim
xmin=max(f12,f16);
xmax=min(f13,f17);    
ymin=max(f14,y2);
ymax=min(f15,y1);

%clear certain variables 
clear f4 f5 f6 f7 f8 f9 f10 f11;

%常数相
if ~isempty(get(handles.edit5,'String'))
    f5 = str2double(get(handles.edit5,'String'));
else f5=0;
end
if ~isempty(get(handles.edit7,'String'))
    f7 = str2double(get(handles.edit7,'String'));
else f7=0;
end
if ~isempty(get(handles.edit9,'String'))
    f9 = str2double(get(handles.edit9,'String'));
else f9=0;
end
if ~isempty(get(handles.edit11,'String'))
    f11 = str2double(get(handles.edit11,'String'));
else f11=0;
end

%向量化
n=10;
x1=linspace(xmin,xmax,n);one=ones(1,n);
hold on;

%x1前系数
t4=get(handles.edit4,'String');
t6=get(handles.edit6,'String');
t8=get(handles.edit8,'String');
t10=get(handles.edit10,'String');

if ~isempty(t4)
    f4 = str2double(get(handles.edit4,'String'));
    A=f4*x1+f5;
else 
    A=(ymax+1)*one;
end
if ~isempty(t6)
    f6 = str2double(get(handles.edit6,'String'));
    B=f6*x1+f7;
else 
    B=(ymax+1)*one;
end
if ~isempty(t8)
    f8 = str2double(get(handles.edit8,'String'));
    C=f8*x1+f9;
else 
    C=(ymin-1)*one;
end
if ~isempty(t10)
    f10 = str2double(get(handles.edit10,'String'));
    D=f10*x1+f11;
else 
    D=(ymin-1)*one;
end

%plot
hold on;
x=linspace(xmin,xmax,n);
loop=0;
for ii=1:n;
    yy1(ii)=min([A(ii),B(ii),ymax]);
    yy2(ii)=max([C(ii),D(ii),ymin]);
    if yy1(ii)>yy2(ii)
        y=linspace(yy1(ii),yy2(ii),n);
        plot(x(ii)*one,y,'.c');
        loop=1;
    end
end
if ~loop
    warndlg('公共区域不存在','让我轻轻地告诉你…………');
end
hold off
    



% --------------------------------------------------------------------
function varargout = pushbutton13_Callback(h, eventdata, handles, varargin)
helpdlg(['如果您不太清楚某个按钮的功能，请将鼠标停留在该按钮上2秒即可得到相应提示 。                                                                .'...
         '如果还有疑问,请email到我的邮箱：  [e-mail]   '...
         '或者tel: 8525124 马祥宁 '],'乐意为您效劳');