matlab编程实例100例.docx

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matlab编程实例100例.docx

matlab编程实例100例

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2:

三角函数曲线

(2)

functionshili02

h0=figure('toolbar','none',...

'position',[200150450350],...

'name','实例02');

x=-pi:

0.05:

pi;

y=sin(x)+cos(x);

plot(x,y,'-*r','linewidth',1);

gridon

xlabel('自变量X');

ylabel('函数值Y');

title('三角函数');

实例3:

图形的叠加

functionshili03

h0=figure('toolbar','none',...

'position',[200150450350],...

'name','实例03');

x=-pi:

0.05:

pi;

y1=sin(x);

y2=cos(x);

plot(x,y1,...

'-*r',...

x,y2,...

'--og');

gridon

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

functionshili04

h0=figure('toolbar','none',...

'position',[200150450250],...

'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('semilogplot');

axes(haxes

(2))

ylabel('linearplot');

实例6:

图形标注

functionshili06

h0=figure('toolbar','none',...

'position',[200150450400],...

'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

functionshili07

h0=figure('toolbar','none',...

'position',[200150450350],...

'name','实例07');

tiao1=[56254822454541445745512];

tiao2=[4748575854526548];

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

functionshili08

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例08');

x=91:

95;

profits1=[8875849377];

profits2=[5164545668];

profits3=[4254342524];

profits4=[263818154];

area(x,profits1,'facecolor',[0.50.90.6],...

'edgecolor','b',...

'linewidth',3)

holdon

area(x,profits2,'facecolor',[0.90.850.7],...

'edgecolor','y',...

'linewidth',3)

holdon

area(x,profits3,'facecolor',[0.30.60.7],...

'edgecolor','r',...

'linewidth',3)

holdon

area(x,profits4,'facecolor',[0.60.50.9],...

'edgecolor','m',...

'linewidth',3)

holdoff

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

functionshili09

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例09');

t=[542135;

685435;

452512;

486845;

685469];

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

functionshili10

h0=figure('toolbar','none',...

'position',[200150450400],...

'name','实例10');

a=0.01;

b=0.5;

t=0:

10;

f=exp(-a*t).*sin(b*t);

stairs(t,f)

holdon

plot(t,f,':

*')

holdoff

glabel='函数e^{-(\alpha*t)}sin\beta*t的阶梯图';

gtext(glabel,'fontsize',16)

xlabel('t=0:

10','fontsize',16)

axis([010-1.21.2])

实例11:

枝干图

functionshili11

h0=figure('toolbar','none',...

'position',[200150450350],...

'name','实例11');

x=0:

pi/20:

2*pi;

y1=sin(x);

y2=cos(x);

h1=stem(x,y1+y2);

holdon

h2=plot(x,y1,'^r',x,y2,'*g');

holdoff

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

functionshili12

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例12');

winddirection=[54246584

2561223562

12532434254];

windpower=[2553

68127

614108];

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

functionshili13

h0=figure('toolbar','none',...

'position',[200150450250],...

'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)

axisequal

xlabel('实部','fontsize',16);

ylabel('虚部','fontsize',16);

h=polar([02*pi],[01]);

delete(h)

holdon

contour(x,y,abs(f),20)

实例14:

交互式图形

functionshili14

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例14');

axis([010010]);

holdon

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;

whilebut==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-');

holdoff

实例14:

交互式图形

functionshili14

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例14');

axis([010010]);

holdon

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;

whilebut==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-');

holdoff

实例15:

变换的傅立叶函数曲线

functionshili15

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例15');

axisequal

m=moviein(20,gcf);

set(gca,'nextplot','replacechildren')

h=uicontrol('style','slider','position',...

[1001050020],'min',1,'max',20)

forj=1:

20

plot(fft(eye(j+16)))

set(h,'value',j)

m(:

j)=getframe(gcf);

end

clf;

axes('position',[0011]);

movie(m,30)

实例16:

劳伦兹非线形方程的无序活动

functionshili15

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例15');

axisequal

m=moviein(20,gcf);

set(gca,'nextplot','replacechildren')

h=uicontrol('style','slider','position',...

[1001050020],'min',1,'max',20)

forj=1:

20

plot(fft(eye(j+16)))

set(h,'value',j)

m(:

j)=getframe(gcf);

end

clf;

axes('position',[0011]);

movie(m,30)

实例17:

填充图

functionshili17

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例17');

t=(1:

2:

15)*pi/8;

x=sin(t);

y=cos(t);

fill(x,y,'r')

axissquareoff

text(0,0,'STOP',...

'color',[111],...

'fontsize',50,...

'horizontalalignment','center')

例18:

条形图和阶梯形图

functionshili18

h0=figure('toolbar','none',...

'position',[200150450250],...

'name','实例18');

subplot(2,2,1)

x=-3:

0.2:

3;

y=exp(-x.*x);

bar(x,y)

title('2-DBarChart')

subplot(2,2,2)

x=-3:

0.2:

3;

y=exp(-x.*x);

bar3(x,y,'r')

title('3-DBarChart')

subplot(2,2,3)

x=-3:

0.2:

3;

y=exp(-x.*x);

stairs(x,y)

title('StairChart')

subplot(2,2,4)

x=-3:

0.2:

3;

y=exp(-x.*x);

barh(x,y)

title('HorizontalBarChart')

实例19:

三维曲线图

functionshili19

h0=figure('toolbar','none',...

'position',[200150450400],...

'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)

gridon

xlabel('X轴');

ylabel('Y轴');

zlabel('Z轴');

title('Figure1:

3-DPlot')

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)

gridon

xlabel('X轴');

ylabel('Y轴');

zlabel('Z轴');

title('Figure2:

3-DPlot')

实例20:

图形的隐藏属性

functionshili20

h0=figure('toolbar','none',...

'position',[200150450300],...

'name','实例20');

subplot(1,2,1)

[x,y,z]=sphere(10);

mesh(x,y,z)

axisoff

title('Figure1:

Opaque')

hiddenon

subplot(1,2,2)

[x,y,z]=sphere(10);

mesh(x,y,z)

axisoff

title('Figure2:

Transparent')

hiddenoff

实例21PEAKS函数曲线

functionshili21

h0=figure('toolbar','none',...

'position',[200100450450],...

'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

functionshili22

h0=figure('toolbar','none',...

'position',[200150550350],...

'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)

hiddenoff

title('Figure1:

TriangularSurfacePlot');

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:

TriangularSurfacePlot');

实例23:

视角的调整

functionshili23

h0=figure('toolbar','none',...

'position',[200150450350],...

'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

functionshili24

h0=figure('toolbar','none',...

'position',[200150450350],...

'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)

holdon

quiver(x,y,dx,dy)

holdoff

title('Figure2')

subplot(2,2,3)

[x,y,z]=peaks(15);

[nx,ny,nz]=surfnorm(x,y,z);

surf(x,

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