常见的MATLAB绘图程序

常见的MATLAB绘图程序y=[3,7,9,1,5,2,8];

subplot(1,2,1),plot(y,'linewidth',2),grid

x=[3,3,9;8,1,2;1,8,5;7,9,1];

subplot(1,2,2),plot(x),xlabel('x'),ylabel('y') grid on

%极坐标曲线

theta=0:0.1:8*pi;

polar(theta,cos(4*theta)+1/4)

%对数坐标

x=0:0.1:2*pi;

y=sin(x);

semilogx(x,y);

grid on

%各种坐标系中

theta=0:0.1:6*pi;

r=cos(theta/3)+1/9;

subplot(2,2,1),polar(theta,r);

subplot(2,2,2),plot(theta,r);

subplot(2,3,4),semilogx(theta,r);

subplot(2,3,5),semilogy(theta,r);

subplot(2,3,6),loglog(theta,r);

grid on

%双y轴图形

x=0:0.01:5;

y=exp(x);

plotyy(x,y,x,y,'semilogy','plot'),grid

grid on

%复数数据

t=0:0.1:2*pi;

x=sin(t);

y=cos(t);

z=x+i*y;

plot(t,z),grid

plot(z)

grid on

%二维图形处理

x=(0:0.1:2*pi)';

y1=2*exp(-0.5*x)*[1,-1];

y2=2*exp(-0.5*x).*sin(2*pi*x);

x1=(0:12)/2;

y3=2*exp(-0.5*x1).*sin(2*pi*x1);

plot(x,y1,'g:',x,y2,'b--',x1,y3,'rp');

title('曲线及其包络线');

xlabel('变量X');

ylabel('变量Y');

text(3.2,0.5,'包络线');

text(0.5,0.5,'曲线y');

text(1.4,0.15,'离散数据点');

legend('包络线','包络线','曲线y','离散数据点') clc

%坐标控制

x=(0:0.1:2*pi)';

y1=2*exp(-0.5*x)*[1,-1];

y2=2*exp(-0.5*x).*sin(2*pi*x);

x1=(0:12)/2;

y3=2*exp(-0.5*x1).*sin(2*pi*x1);

plot(x,y1,'g:',x,y2,'b--',x1,y3,'rp');

plot(x,y1,'g:');

hold on;

plot(x,y2,'b--');

plot(x1,y3,'rp');

grid on;

box off;

hold off;

%图形窗口的分割

t=(0:10:360)*pi/180;

y=sin(t);

subplot(2,1,1),plot(t,y);

subplot(2,2,3),stem(t,y);

subplot(2,2,4),polar(t,y);

y2=cos(t);y3=y2.*y2;

plot(t,y,'-or',t,y2,'-h',t,y3,'-xb');

xlabel('时间');

ylabel('幅值');

axis([-1,8,-1.2,1.2]);

%图形设置

t=linspace(0,2*pi,60);

y1=sin(t);

y2=cos(t);

y3=y1.*y2;

h=figure(1);

stairs(t,y1);

h1=axes('pos',[0.2,0.2,0.6,0.4]);plot(t,y1);

h2=axes('pos',[0.1,0.1,0.8,0.1]);stem(t,y1);

h3=axes('pos',[0.5,0.5,0.4,0.4]);fill(t,y1,'g');

h4=axes('pos',[0.1,0.6,0.3,0.3]);plot(t,y1,'-',t,y2,':',t,y3,'o'); %在图形中任意绘制坐标系

set(h4,'pos',[0.1,0.1,0.4,0.4]);

set(h,'pos',[0,0,560,400]);

set(h3,'box','off');

set(h3,'xgrid','on');

set(h3,'gridlinestyle','-');

set(h3,'xdir','reverse');

set(h3,'xdir','normal');

ht3=get(h3,'title');

set(ht3,'string','澳洲人的回旋镖');

set(ht3,'rotation',-10);

set(ht3,'color',[244 29 249]/255);

%三维曲线图

t=-pi:pi/200:8*pi;

h=figure(1);

set(h,'color',[1,1,1]);

subplot(1,2,1),plot3(cos(t),sin(t),t,'b-');

subplot(1,2,2),plot3(sin(t),cos(t),t,':');

%三维网格图

[x,y]=meshgrid(-8:0.5:8,-10:0.5:10);

R=sqrt(x.^2+y.^2)+eps;

z=sin(R)./R;

mesh(x,y,z);

hidden off

%三维曲面

%绘制标准球面图

subplot(2,2,1),sphere(4);

title('n=4'),axis equal;

subplot(2,2,2),sphere(6);

title('n=6'),axis equal;

subplot(2,2,3),sphere(20);

title('n=20'),axis equal;

subplot(2,2,4),sphere(50);

title('n=50'),axis equal;

%标准柱面图

t=linspace(pi/2,3.5*pi,50);

R=cos(t)+2;

subplot(2,2,1),cylinder(R,3),title('n=3');

subplot(2,2,2),cylinder(R,6),title('n=6');

subplot(2,2,3),cylinder(R,20),title('n=20');

subplot(2,2,4),cylinder(R,50),title('n=50');

%图形的平滑

[x,y]=meshgrid(-8:0.5:8,-10:0.5:10);