常见的MATLAB绘图程序y=[3,7,9,1,5,2,8];subplot(1,2,1),plot(y,'linewidth',2),gridx=[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'),gridgrid on%复数数据t=0:0.1:2*pi;x=sin(t);y=cos(t);z=x+i*y;plot(t,z),gridplot(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);R=sqrt(x.^2+y.^2)+eps;z=sin(R)./R;surf(x,y,z);colorbar;shading flatshading interp[x,y]=meshgrid(-8:0.5:8,-10:0.5:10);R=sqrt(x.^2+y.^2)+eps;z=sin(R)./R;surfc(x,y,z);colorbar;[x,y]=meshgrid(-8:0.5:8,-10:0.5:10);R=sqrt(x.^2+y.^2)+eps;z=sin(R)./R;surfl(x,y,z);colorbar;%专用图形%条形图Y=[3,8,2;8,9,2;8,3,3;2,5,6;9,5,1];subplot(1,2,1),bar(Y),title('二维条形图');subplot(1,2,2),bar3(Y),title('三维条形图');%直方图y1=randn(10000,1);y2=rand(10000,1);subplot(1,2,1);hist(y1,20);title('正态分布');subplot(1,2,2);hist(y2,10);title('均匀分布');theta=randn(1000,1);theta=pi*theta/max(theta);rose(theta);%饼形图%二维饼形图cj=[80,95,70,40];pie(cj,[0,0,1,0]);%三维饼形图cj=[80,95,70,40];pie3(cj,[0,0,1,0],{'语文28%','数学33%','外语25%','政治14%'}); %离散数据图x=linspace(0,2*pi,40);a=sin(2*x);b=cos(x);stem(x,a+b);hold on;plot(x,a);hold on;plot(x,b);hold on;%三维离散数据图th=(0:127)/128*2*pi;x=th.*cos(th);y=th.*sin(th);stem3(x,y,th,'fill');view([-158 66]);xlabel('X轴');ylabel('Y轴');zlabel('Z轴');title('三维火柴杆图');hold on;plot3(x,y,th,'k');hold on;%阶梯图alpha=0.01;beta=0.5;t=0:10;f=exp(-alpha*t).*sin(2*beta*t);stairs(t,f);hold on;plot(t,f,'--*');hold off;label='函数e^{-(\alpha*t)}sin2\beta*t的阶梯图'; text(0.5,0.2,label,'FontSize',12);xlabel('t=0:10','FontSize',14);axis([0,10,-1.2,1.2]);%等高线图[x,y,z]=peaks;contour(x,y,z,15);%三维等高图[x,y,z]=peaks;contour3(x,y,z,20);colormap(hsv)%瀑布图waterfall(peaks);axis tight;。