Matlab100个实例程序.doc

程序代码： (代码标记  [code]...[/code]  )

1-32是：图形应用篇
33-66是：界面设计篇
67-84是：图形处理篇
85-100是：数值分析篇
实例1：三角函数曲线（1）
function shili01
h0=figure('toolbar','none',...
   'position',[198 56 350 300],...
   'name','实例01');
h1=axes('parent',h0,...
  'visible','off');
x=-pi:0.05:pi;
y=sin(x);
plot(x,y);
xlabel('自变量X');
ylabel('函数值Y');
title('SIN( )函数曲线');
grid on
实例2：三角函数曲线（2）
function shili02
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例02');
x=-pi:0.05:pi;
y=sin(x)+cos(x);
plot(x,y,'-*r','linewidth',1);
grid on
xlabel('自变量X');
ylabel('函数值Y');
title('三角函数');
实例3：图形的叠加
function shili03
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例03');
x=-pi:0.05:pi;
y1=sin(x);
y2=cos(x);
plot(x,y1,...
   '-*r',...
   x,y2,...
   '--og');
grid on
xlabel('自变量X');
ylabel('函数值Y');
title('三角函数');
实例4：双y轴图形的绘制
function shili04
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例04');
x=0:900;a=1000;b=0.005;
y1=2*x;
y2=cos(b*x);
[haxes,hline1,hline2]=plotyy(x,y1,x,y2,'semilogy','plot');
axes(haxes(1))
ylabel('semilog plot');
axes(haxes(2))
ylabel('linear plot');
实例5：单个轴窗口显示多个图形
function shili05
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例05');
t=0:pi/10:2*pi;
[x,y]=meshgrid(t);
subplot(2,2,1)
plot(sin(t),cos(t))
axis equal
subplot(2,2,2)
z=sin(x)-cos(y);
plot(t,z)
axis([0 2*pi -2 2])
subplot(2,2,3)
h=sin(x)+cos(y);
plot(t,h)
axis([0 2*pi -2 2])
subplot(2,2,4)
g=(sin(x).^2)-(cos(y).^2);
plot(t,g)
axis([0 2*pi -1 1])
实例6：图形标注
function shili06
h0=figure('toolbar','none',...
   'position',[200 150 450 400],...
   'name','实例06');
t=0:pi/10:2*pi;
h=plot(t,sin(t));
xlabel('t=0到2\pi','fontsize',16);
ylabel('sin(t)','fontsize',16);
title('\it{从 0to2\pi 的正弦曲线}','fontsize',16)
x=get(h,'xdata');
y=get(h,'ydata');
imin=find(min(y)==y);
imax=find(max(y)==y);
text(x(imin),y(imin),...
   ['\leftarrow最小值=',num2str(y(imin))],...
   'fontsize',16)
text(x(imax),y(imax),...
   ['\leftarrow最大值=',num2str(y(imax))],...
   'fontsize',16)

实例7：条形图形
function shili07
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例07');
tiao1=[562 548 224 545 41 445 745 512];
tiao2=[47 48 57 58 54 52 65 48];
t=0:7;
bar(t,tiao1)
xlabel('X轴');
ylabel('TIAO1值');
h1=gca;
h2=axes('position',get(h1,'position'));
plot(t,tiao2,'linewidth',3)
set(h2,'yaxislocation','right','color','none','xticklabel',[])
实例8：区域图形
function shili08
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例08');
x=91:95;
profits1=[88 75 84 93 77];
profits2=[51 64 54 56 68];
profits3=[42 54 34 25 24];
profits4=[26 38 18 15 4];
area(x,profits1,'facecolor',[0.5 0.9 0.6],...
   'edgecolor','b',...
   'linewidth',3)
hold on
area(x,profits2,'facecolor',[0.9 0.85 0.7],...
   'edgecolor','y',...
   'linewidth',3)
hold on
area(x,profits3,'facecolor',[0.3 0.6 0.7],...
   'edgecolor','r',...
   'linewidth',3)
hold on
area(x,profits4,'facecolor',[0.6 0.5 0.9],...
   'edgecolor','m',...
   'linewidth',3)
hold off
set(gca,'xtick',[91:95])
set(gca,'layer','top')
gtext('\leftarrow第一季度销量')
gtext('\leftarrow第二季度销量')
gtext('\leftarrow第三季度销量')
gtext('\leftarrow第四季度销量')
xlabel('年','fontsize',16);
ylabel('销售量','fontsize',16);
实例9：饼图的绘制
function shili09
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例09');
t=[54 21 35;
   68 54 35;
   45 25 12;
   48 68 45;
   68 54 69];
x=sum(t);
h=pie(x);
textobjs=findobj(h,'type','text');
str1=get(textobjs,{'string'});
val1=get(textobjs,{'extent'});
oldext=cat(1,val1{:});
names={'商品一：';'商品二：';'商品三：'};
str2=strcat(names,str1);
set(textobjs,{'string'},str2)
val2=get(textobjs,{'extent'});
newext=cat(1,val2{:});
offset=sign(oldext(:,1)).*(newext(:,3)-oldext(:,3))/2;
pos=get(textobjs,{'position'});
textpos=cat(1,pos{:});
textpos(:,1)=textpos(:,1)+offset;
set(textobjs,{'position'},num2cell(textpos,[3,2]))
实例10：阶梯图
function shili10
h0=figure('toolbar','none',...
   'position',[200 150 450 400],...
   'name','实例10');
a=0.01;
b=0.5;
t=0:10;
f=exp(-a*t).*sin(b*t);
stairs(t,f)
hold on
plot(t,f,':*')
hold off
glabel='函数e^{-(\alpha*t)}sin\beta*t的阶梯图';
gtext(glabel,'fontsize',16)
xlabel('t=0:10','fontsize',16)
axis([0 10 -1.2 1.2])
实例11：枝干图
function shili11
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例11');
x=0:pi/20:2*pi;
y1=sin(x);
y2=cos(x);
h1=stem(x,y1+y2);
hold on
h2=plot(x,y1,'^r',x,y2,'*g');
hold off
h3=[h1(1);h2];
legend(h3,'y1+y2','y1=sin(x)','y2=cos(x)')
xlabel('自变量X');
ylabel('函数值Y');
title('正弦函数与余弦函数的线性组合');
实例12：罗盘图
function shili12
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例12');
winddirection=[54 24 65 84
   256 12 235 62
   125 324 34 254];
windpower=[2 5 5 3
   6 8 12 7
   6 14 10 8];
rdirection=winddirection*pi/180;
[x,y]=pol2cart(rdirection,windpower);
compass(x,y);
desc={'风向和风力',
   '北京气象台',
   '10月1日0：00到',
   '10月1日12：00'};
gtext(desc)
实例13：轮廓图
function shili13
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例13');
[th,r]=meshgrid((0:10:360)*pi/180,0:0.05:1);
[x,y]=pol2cart(th,r);
z=x+i*y;
f=(z.^4-1).^(0.25);
contour(x,y,abs(f),20)
axis equal
xlabel('实部','fontsize',16);
ylabel('虚部','fontsize',16);
h=polar([0 2*pi],[0 1]);
delete(h)
hold on
contour(x,y,abs(f),20)
实例14：交互式图形
function shili14
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例14');
axis([0 10 0 10]);
hold on
x=[];
y=[];
n=0;
disp('单击鼠标左键点取需要的点');
disp('单击鼠标右键点取最后一个点');
but=1;
while but==1
   [xi,yi,but]=ginput(1);
   plot(xi,yi,'bo')
   n=n+1;
   disp('单击鼠标左键点取下一个点');
   x(n,1)=xi;
   y(n,1)=yi;
end
t=1:n;
ts=1:0.1:n;
xs=spline(t,x,ts);
ys=spline(t,y,ts);
plot(xs,ys,'r-');
hold off
实例15：变换的傅立叶函数曲线
function shili15
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例15');
axis equal
m=moviein(20,gcf);
set(gca,'nextplot','replacechildren')
h=uicontrol('style','slider','position',...
   [100 10 500 20],'min',1,'max',20)
for j=1:20
   plot(fft(eye(j+16)))
   set(h,'value',j)
   m(:,j)=getframe(gcf);
end
clf;
axes('position',[0 0 1 1]);
movie(m,30)
实例16：劳伦兹非线形方程的无序活动
function shili15
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例15');
axis equal
m=moviein(20,gcf);
set(gca,'nextplot','replacechildren')
h=uicontrol('style','slider','position',...
   [100 10 500 20],'min',1,'max',20)
for j=1:20
   plot(fft(eye(j+16)))
   set(h,'value',j)
   m(:,j)=getframe(gcf);
end
clf;
axes('position',[0 0 1 1]);
movie(m,30)
实例17：填充图
function shili17
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例17');
t=(1:2:15)*pi/8;
x=sin(t);
y=cos(t);
fill(x,y,'r')
axis square off
text(0,0,'STOP',...
   'color',[1 1 1],...
   'fontsize',50,...
   'horizontalalignment','center')
实例18：条形图和阶梯形图
function shili18
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例18');
subplot(2,2,1)
x=-3:0.2:3;
y=exp(-x.*x);
bar(x,y)
title('2-D Bar Chart')
subplot(2,2,2)
x=-3:0.2:3;
y=exp(-x.*x);
bar3(x,y,'r')
title('3-D Bar Chart')
subplot(2,2,3)
x=-3:0.2:3;
y=exp(-x.*x);
stairs(x,y)
title('Stair Chart')
subplot(2,2,4)
x=-3:0.2:3;
y=exp(-x.*x);
barh(x,y)
title('Horizontal Bar Chart')
实例19：三维曲线图
function shili19
h0=figure('toolbar','none',...
   'position',[200 150 450 400],...
   'name','实例19');
subplot(2,1,1)
x=linspace(0,2*pi);
y1=sin(x);
y2=cos(x);
y3=sin(x)+cos(x);
z1=zeros(size(x));
z2=0.5*z1;
z3=z1;
plot3(x,y1,z1,x,y2,z2,x,y3,z3)
grid on
xlabel('X轴');
ylabel('Y轴');
zlabel('Z轴');
title('Figure1:3-D Plot')
subplot(2,1,2)
x=linspace(0,2*pi);
y1=sin(x);
y2=cos(x);
y3=sin(x)+cos(x);
z1=zeros(size(x));
z2=0.5*z1;
z3=z1;
plot3(x,z1,y1,x,z2,y2,x,z3,y3)
grid on
xlabel('X轴');
ylabel('Y轴');
zlabel('Z轴');
title('Figure2:3-D Plot')
实例20：图形的隐藏属性
function shili20
h0=figure('toolbar','none',...
   'position',[200 150 450 300],...
   'name','实例20');
subplot(1,2,1)
[x,y,z]=sphere(10);
mesh(x,y,z)
axis off
title('Figure1:Opaque')
hidden on
subplot(1,2,2)
[x,y,z]=sphere(10);
mesh(x,y,z)
axis off
title('Figure2:Transparent')
hidden off
实例21：PEAKS函数曲线
function shili21
h0=figure('toolbar','none',...
   'position',[200 100 450 450],...
   'name','实例21');
[x,y,z]=peaks(30);
subplot(2,1,1)
x=x(1,:);
y=y(:,1);
i=find(y>0.8&y<1.2);
j=find(x>-0.6&x<0.5);
z(i,j)=nan*z(i,j);
surfc(x,y,z)
xlabel('X轴');
ylabel('Y轴');
zlabel('Z轴');
title('Figure1:surfc函数形成的曲面')
subplot(2,1,2)
x=x(1,:);
y=y(:,1);
i=find(y>0.8&y<1.2);
j=find(x>-0.6&x<0.5);
z(i,j)=nan*z(i,j);
surfl(x,y,z)
xlabel('X轴');
ylabel('Y轴');
zlabel('Z轴');
title('Figure2:surfl函数形成的曲面')
实例22：片状图
function shili22
h0=figure('toolbar','none',...
   'position',[200 150 550 350],...
   'name','实例22');
subplot(1,2,1)
x=rand(1,20);
y=rand(1,20);
z=peaks(x,y*pi);
t=delaunay(x,y);
trimesh(t,x,y,z)
hidden off
title('Figure1:Triangular Surface Plot');
subplot(1,2,2)
x=rand(1,20);
y=rand(1,20);
z=peaks(x,y*pi);
t=delaunay(x,y);
trisurf(t,x,y,z)
title('Figure1:Triangular Surface Plot');
实例23：视角的调整
function shili23
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例23');
x=-5:0.5:5;
[x,y]=meshgrid(x);
r=sqrt(x.^2+y.^2)+eps;
z=sin(r)./r;
subplot(2,2,1)
surf(x,y,z)
xlabel('X-axis')
ylabel('Y-axis')
zlabel('Z-axis')
title('Figure1')
view(-37.5,30)
subplot(2,2,2)
surf(x,y,z)
xlabel('X-axis')
ylabel('Y-axis')
zlabel('Z-axis')
title('Figure2')
view(-37.5+90,30)
subplot(2,2,3)
surf(x,y,z)
xlabel('X-axis')
ylabel('Y-axis')
zlabel('Z-axis')
title('Figure3')
view(-37.5,60)
subplot(2,2,4)
surf(x,y,z)
xlabel('X-axis')
ylabel('Y-axis')
zlabel('Z-axis')
title('Figure4')
view(180,0)
实例24：向量场的绘制
function shili24
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例24');
subplot(2,2,1)
z=peaks;
ribbon(z)
title('Figure1')
subplot(2,2,2)
[x,y,z]=peaks(15);
[dx,dy]=gradient(z,0.5,0.5);
contour(x,y,z,10)
hold on
quiver(x,y,dx,dy)
hold off
title('Figure2')
subplot(2,2,3)
[x,y,z]=peaks(15);
[nx,ny,nz]=surfnorm(x,y,z);
surf(x,y,z)
hold on
quiver3(x,y,z,nx,ny,nz)
hold off
title('Figure3')
subplot(2,2,4)
x=rand(3,5);
y=rand(3,5);
z=rand(3,5);
c=rand(3,5);
fill3(x,y,z,c)
grid on
title('Figure4')
实例25：灯光定位
function shili25
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例25');
vert=[1 1 1;1 2 1;
   2 2 1;2 1 1;
   1 1 2;1 2 2;
   2 2 2;2 1 2];
fac=[1 2 3 4;2 6 7 3;
   4 3 7 8;1 5 8 4;
   1 2 6 5;5 6 7 8];
grid off
sphere(36)
h=findobj('type','surface');
set(h,'facelighting','phong',...
   'facecolor',...
   'interp',...
   'edgecolor',[0.4 0.4 0.4],...
   'backfacelighting',...
   'lit')
hold on
patch('faces',fac,'vertices',vert,...
   'facecolor','y');
light('position',[1 3 2]);
light('position',[-3 -1 3]);
material shiny
axis vis3d off
hold off
实例26：柱状图
function shili26
h0=figure('toolbar','none',...
   'position',[200 50 450 450],...
   'name','实例26');
subplot(2,1,1)
x=[5 2 1
   8 7 3
   9 8 6
   5 5 5
   4 3 2];
bar(x)
xlabel('X轴');
ylabel('Y轴');
title('第一子图');
subplot(2,1,2)
y=[5 2 1
   8 7 3
   9 8 6
   5 5 5
   4 3 2];
barh(y)
xlabel('X轴');
ylabel('Y轴');
title('第二子图');
实例27：设置照明方式
function shili27
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例27');
subplot(2,2,1)
sphere
shading flat
camlight left
camlight right
lighting flat
colorbar
axis off
title('Figure1')
subplot(2,2,2)
sphere
shading flat
camlight left
camlight right
lighting gouraud
colorbar
axis off
title('Figure2')
subplot(2,2,3)
sphere
shading interp
camlight right
camlight left
lighting phong
colorbar
axis off
title('Figure3')
subplot(2,2,4)
sphere
shading flat
camlight left
camlight right
lighting none
colorbar
axis off
title('Figure4')
实例28：羽状图
function shili28
h0=figure('toolbar','none',...
   'position',[200 150 450 350],...
   'name','实例28');
subplot(2,1,1)
alpha=90:-10:0;
r=ones(size(alpha));
m=alpha*pi/180;
n=r*10;
[u,v]=pol2cart(m,n);
feather(u,v)
title('羽状图')
axis([0 20 0 10])
subplot(2,1,2)
t=0:0.5:10;
x=0.05+i;
y=exp(-x*t);
feather(y)
title('复数矩阵的羽状图')
实例29：立体透视（1）
function shili29
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例29');
[x,y,z]=meshgrid(-2:0.1:2,...
   -2:0.1:2,...
   -2:0.1:2);
v=x.*exp(-x.^2-y.^2-z.^2);
grid on
for i=-2:0.5:2;
   h1=surf(linspace(-2,2,20),...
       linspace(-2,2,20),...
       zeros(20)+i);
   rotate(h1,[1 -1 1],30)
   dx=get(h1,'xdata');
   dy=get(h1,'ydata');
   dz=get(h1,'zdata');
   delete(h1)
   slice(x,y,z,v,[-2 2],2,-2)
   hold on
   slice(x,y,z,v,dx,dy,dz)
   hold off
   axis tight
   view(-5,10)
   drawnow
end
实例30：立体透视（2）
function shili30
h0=figure('toolbar','none',...
   'position',[200 150 450 250],...
   'name','实例30');
[x,y,z]=meshgrid(-2:0.1:2,...
   -2:0.1:2,...
   -2:0.1:2);
v=x.*exp(-x.^2-y.^2-z.^2);
[dx,dy,dz]=cylinder;
slice(x,y,z,v,[-2 2],2,-2)
for i=-2:0.2:2
   h=surface(dx+i,dy,dz);
   rotate(h,[1 0 0],90)
   xp=get(h,'xdata');
   yp=get(h,'ydata');
   zp=get(h,'zdata');
   delete(h)
   hold on
   hs=slice(x,y,z,v,xp,yp,zp);
   axis tight
   xlim([-3 3])
   view(-10,35)
   drawnow
   delete(hs)
   hold off
end
实例31：表面图形
function shili31
h0=figure('toolbar','none',...
   'position',[200 150 550 250],...
   'name','实例31');
subplot(1,2,1)
x=rand(100,1)*16-8;
y=rand(100,1)*16-8;
r=sqrt(x.^2+y.^2)+eps;
z=sin(r)./r;
xlin=linspace(min(x),max(x),33);
ylin=linspace(min(y),max(y),33);
[X,Y]=meshgrid(xlin,ylin);
Z=griddata(x,y,z,X,Y,'cubic');
mesh(X,Y,Z)
axis tight
hold on
plot3(x,y,z,'.','Markersize',20)
subplot(1,2,2)
k=5;
n=2^k-1;
theta=pi*(-n:2:n)/n;
phi=(pi/2)*(-n:2:n)'/n;
X=cos(phi)*cos(theta);
Y=cos(phi)*sin(theta);
Z=sin(phi)*ones(size(theta));
colormap([0 0 0;1 1 1])
C=hadamard(2^k);
surf(X,Y,Z,C)
axis square
实例32：沿曲线移动的小球
h0=figure('toolbar','none',...
   'position',[198 56 408 468],...
   'name','实例32');
h1=axes('parent',h0,...
   'position',[0.15 0.45 0.7 0.5],...
   'visible','on');
t=0:pi/24:4*pi;
y=sin(t);
plot(t,y,'b')
n=length(t);
h=line('color',[0 0.5 0.5],...
   'linestyle','.',...
   'markersize',25,...
   'erasemode','xor');
k1=uicontrol('parent',h0,...
   'style','pushbutton',...
   'position',[80 100 50 30],...
   'string','开始',...
   'callback',[...
       'i=1;',...
       'k=1;,',...
       'm=0;,',...
       'while 1,',...
       'if k==0,',...
       'break,',...
       'end,',...
       'if k~=0,',...