matlab编程实例100例.docx
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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1:
三角函数曲线〔1〕
functionshili01
h0=figure('toolbar','none',...
'position',[19856350300],...
'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');
gridon
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5:
单个轴窗口显示多个图形
functionshili05
h0=figure('toolbar','none',...
'position',[200150450250],...
'name','实例05');
t=0:
pi/10:
2*pi;
[x,y]=meshgrid(t);
subplot(2,2,1)
plot(sin(t),cos(t))
axisequal
subplot(2,2,2)
z=sin(x)-cos(y);
plot(t,z)
axis([02*pi-22])
subplot(2,2,3)
h=sin(x)+cos(y);
plot(t,h)
axis([02*pi-22])
subplot(2,2,4)
g=(sin(x).^2)-(cos(y).^2);
plot(t,g)
axis([02*pi-11])
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:
0