e3=uicontrol('parent',h0,...
    'units','points',...
    'tag','e3',...
    'style','edit',...
    'horizontal','right',...
    'backgroundcolor',[1 1 1],...
    'fontsize',12,...
    'position',[140 80 30 20],...
    'string',num2str(now(3)));
t3=uicontrol('parent',h0,...
    'units','points',...
    'tag','t3',...
    'style','text',...
    'string','日',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'fontsize',14,...
    'position',[175 80 20 20]);
e4=uicontrol('parent',h0,...
    'units','points',...
    'tag','e4',...
    'style','edit',...
    'backgroundcolor',[1 1 1],...
    'horizontal','right',...
    'fontsize',12,...
    'position',[20 30 100 20],...
    'string',[num2str(now(4)),'：',num2str(now(5)),'：',num2str(now(6))]);
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'string','關閉',...
    'fontsize',12,...
    'position',[150 30 50 20],...
    'callback',[...
        'k=1;,',...
        'close']);
k=0;
while find(get(0,'children'))==h0
    now1=fix(clock)
    set(e1,'string',num2str(now1(1)));
    set(e2,'string',num2str(now1(2)));
    set(e3,'string',num2str(now1(3)));
    set(e4,'string',[num2str(now1(4)),'：',num2str(now1(5)),'：',num2str(now1(6))]);
    pause(1)
    if k==1
        break
    end
end

實例65：時間計算器

h0=figure('toolbar','none',...
    'position',[200 150 300 250],...
    'name','實例65');
huidiao=[...
        'k=0;,',...
        'fyear=str2num(get(e1,''string''));,',...
        'fmonth=str2num(get(e2,''string''));,',...
        'fday=str2num(get(e3,''string''));,',...
        'syear=str2num(get(e4,''string''));,',...
        'smonth=str2num(get(e5,''string''));,',...
        'sday=str2num(get(e6,''string''));,',...
        'month=[0 31 28 31 30 31 30 31 31 30 31 30 31];,',...
        'k=fix(fyear/4);,',...
        'if rem(fyear,4)==0,',...
        'month(3)=29;,',...
        'else,',...
        'k=k+1;,',...
        'month(3)=28;,',...
        'end,',...
        'sum=0;,',...
        'for i=1:fmonth,',...
        'sum=sum+month(i);,',...
        'end,',...
        'fdday=fyear*365+sum+fday+k;,',...
        'l=fix(syear/4);,',...
        'if rem(syear,4)==0,',...
        'month(3)=29;,',...
        'else,',...
        'l=l+1;,',...
        'month(3)=28;,',...
        'end,',...
        'ssum=0;,',...
        'for i=1:smonth,',...
        'ssum=ssum+month(i);,',...
        'end,',...
        'sdday=syear*365+ssum+sday+l;,',...
        'dday=abs(fdday-sdday);,',...
        'set(e7,''string'',[num2str(dday),''天'']);'];
t0=uicontrol('parent',h0,...
    'units','points',...
    'tag','t0',...
    'style','text',...
    'string','開始日期：',...
    'horizontalalignment','right',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[10 160 80 20]);
t8=uicontrol('parent',h0,...
    'units','points',...
    'tag','t8',...
    'style','text',...
    'string','結束日期：',...
    'horizontalalignment','right',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[115 160 80 20]);
e1=uicontrol('parent',h0,...
    'units','points',...
    'tag','e1',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[20 130 50 20]);
t1=uicontrol('parent',h0,...
    'units','points',...
    'tag','t1',...
    'style','text',...
    'string','年',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[75 130 20 20]);
e2=uicontrol('parent',h0,...
    'units','points',...
    'tag','e2',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[20 100 50 20]);
t2=uicontrol('parent',h0,...
    'units','points',...
    'tag','t2',...
    'style','text',...
    'string','月',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[75 100 20 20]);
e3=uicontrol('parent',h0,...
    'units','points',...
    'tag','e3',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[20 70 50 20]);
t3=uicontrol('parent',h0,...
    'units','points',...
    'tag','t3',...
    'style','text',...
    'string','日',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[75 70 20 20]);
e4=uicontrol('parent',h0,...
    'units','points',...
    'tag','e4',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[120 130 50 20]);
t4=uicontrol('parent',h0,...
    'units','points',...
    'tag','t4',...
    'style','text',...
    'string','年',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[175 130 20 20]);
e5=uicontrol('parent',h0,...
    'units','points',...
    'tag','e5',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[120 100 50 20]);
t5=uicontrol('parent',h0,...
    'units','points',...
    'tag','t5',...
    'style','text',...
    'string','月',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[175 100 20 20]);
e6=uicontrol('parent',h0,...
    'units','points',...
    'tag','e6',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[120 70 50 20]);
t6=uicontrol('parent',h0,...
    'units','points',...
    'tag','t6',...
    'style','text',...
    'string','日',...
    'horizontalalignment','left',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[175 70 20 20]);
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','計算日期',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[20 40 50 20],...
    'callback',huidiao);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[20 10 50 20],...
    'callback','close');
e7=uicontrol('parent',h0,...
    'units','points',...
    'tag','e7',...
    'style','edit',...
    'horizontalalignment','right',...
    'backgroundcolor',[1 1 1],...
    'position',[120 10 80 20]);
t7=uicontrol('parent',h0,...
    'units','points',...
    'tag','t7',...
    'style','text',...
    'string','兩個日期相差：',...
    'horizontalalignment','right',...
    'fontsize',15,...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[100 30 110 20]);

實例66：數字操作

h0=figure('toolbar','none',...
    'position',[200 150 350 200],...
    'name','實例66');
e1=uicontrol('parent',h0,...
    'units','points',...
    'tag','e1',...
    'style','edit',...
    'backgroundcolor',[1 1 1],...
    'position',[20 90 80 20],...
    'fontsize',12,...
    'horizontalalignment','right');
e2=uicontrol('parent',h0,...
    'units','points',...
    'tag','e2',...
    'style','edit',...
    'backgroundcolor',[1 1 1],...
    'position',[160 90 80 20],...
    'fontsize',12,...
    'horizontalalignment','right');
t1=uicontrol('parent',h0,...
    'units','points',...
    'tag','t1',...
    'style','text',...
    'string','初始數值（十進制）：',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[15 110 90 20],...
    'fontsize',12,...
    'horizontalalignment','left');
t2=uicontrol('parent',h0,...
    'units','points',...
    'tag','t2',...
    'style','text',...
    'string','轉換結果：',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[155 110 90 20],...
    'fontsize',12,...
    'horizontalalignment','left');
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'string','二進制',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 50 50 20],...
    'callback',[...
        'k=get(e1,''string'');,',...
        'k2=str2num(k);,',...
        'bk=dec2bin(k2);,',...
        'set(e2,''string'',num2str(bk));']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'string','清除',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 50 50 20],...
    'callback',[...
        'set(e1,''string'','''');,',...
        'set(e2,''string'','''');']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'style','pushbutton',...
    'string','十六進制',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[30 15 50 20],...
    'callback',[...
        'k=get(e1,''string'');,',...
        'k3=str2num(k);,',...
        'hk=dec2hex(k3);,',...
        'set(e2,''string'',num2str(hk));']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'style','pushbutton',...
    'string','關閉',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'position',[170 15 50 20],...
    'callback','close'); 

實例67：圖像的塊操作

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','實例67');
h1=axes('parent',h0,...
    'position',[0.2 0.45 0.6 0.5],...
    'visible','off');
I=imread('tire.tif');
imshow(I)
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','邊沿操作',...
    'position',[30 100 50 20],...
    'callback',[...
        'cla,',...
        'I=imread(''tire.tif'');,',...
        'f=inline(''max(x(:))'');,',...
        'I2=nlfilter(I,[2 2],f);,',...
        'imshow(I2)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','顯示塊操作',...
    'position',[100 100 50 20],...
    'callback',[...
        'cla,',...
        'I=imread(''tire.tif'');,',...
        'f=inline(''uint8(round(mean2(x)*ones(size(x))))'');,',...
        'I2=blkproc(I,[6 6],f);,',...
        'imshow(I2)']);
b3=uicontrol('parent',h0,...
    'units','points',...
    'tag','b3',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','交疊塊操作',...
    'position',[170 100 50 20],...
    'callback',[...
        'cla,',...
        'I=imread(''tire.tif'');,',...
        'f=inline(''uint8(round(mean2(x)*ones(size(x))))'');,',...
        'I2=blkproc(I,[6 6],[3 3],f);,',...
        'imshow(I2)']);
b4=uicontrol('parent',h0,...
    'units','points',...
    'tag','b4',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','關閉',...
    'fontsize',14,...
    'position',[90 50 70 30],...
    'callback','close');

實例68：圖形的過濾操作

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','過濾操作');
h1=axes('parent',h0,...
    'position',[0.3 0.45 0.5 0.5],...
    'visible','off');
I=imread('blood1.tif');
imshow(I)
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'string','均平過濾',...
    'position',[50 120 50 20],...
    'callback',[...
        'cla,',...
        'I=imread(''blood1.tif'');,',...
        'h=fspecial(''average'',6);,',...
        'I2=uint8(round(filter2(h,I)));,',...
        'imshow(I2)']);
b2=uicontrol('parent',h0,...
    'units','points',...
    'tag','b2',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'string','Sobel過濾',...
    'position',[150 120 50 20],...
    'callback',[...
        'cla,',...
        'I=imread(''blood1.tif'');,',...
        'h=fspecial(''sobel'');,',...
        'I2=filter2(h,I);,',...
        'imshow(I2,[])']);
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'style','pushbutton',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'string','關閉',...
    'position',[85 60 80 30],...
    'callback','close'); 

實例69：圖像的頻率操作

h0=figure('toolbar','none',...
    'position',[198 56 350 468],...
    'name','頻率操作');
h1=axes('parent',h0,...
    'position',[0.3 0.45 0.5 0.5],...
    'visible','off');
b=remez(10,[0 0.4 0.6 1],[1 1 0 0]);
h=ftrans2(b);
[H,W]=freqz(b,1,64,'whole');
colormap(jet(64))
plot(W/pi-1,fftshift(abs(H)))
b1=uicontrol('parent',h0,...
    'units','points',...
    'tag','b1',...
    'backgroundcolor',[0.75 0.75 0.75],...
    'style','pushbutton',...
    'string','頻率變換',...
    'position',[30 100 50 20],...
    'callback',[...
        'cla,',