MATLAB程序设计与应用刘卫国（第三版）课后实验答案——13
一二三四五六一
h=figure('MenuBar','figure','color','r','WindowButtonDownFcn','disp("Left Button Pressed")')
二
x=-2:0.01:2;y=1/2.*log(x+sqrt(1+x.^2));h=line(x,y);set(h,'color','r','linestyle',':','linewidth',2)text(1,exp(2),'y=1/2*log(x+sqrt(1+x^2))')t=-2:0.01:2;x=t.^2;y=5.*t.^3;h1=line(t,x);set(h1,'color','r','linestyle',':','linewidth',2)text(-1.5,0,'x=t.^2')hold onh2=line(t,y);set(h2,'color','b','linestyle',':','linewidth',3)text(1.5,20,'y=5.*t.^3')x=-2:0.01:2;y=(1+x.^2)./(1+x.^4);h=line(x,y);set(h,'color','r','linestyle',':','linewidth',2)text(1,1,'y=(1+x.^2)./(1+x.^4)')x=-2:0.01:2;y=x.^2.*exp(2*x);h=line(x,y);set(h,'color','r','linestyle',':','linewidth',2)text(1,exp(2),'y=x^2*exp(2*x)')
三
t=-20*pi:0.1*pi:20*pi;[t,~]=meshgrid(t);x=t;y=2.*t.*cos(t);z=5.*t.*sin(t);axes('view',[-37.5,30]);surface(x,y,z)axis equaltheta=0:0.01*pi:2*pi;t=0:0.01*pi:2*pi;[theta,t]=meshgrid(theta,t);x=2.*cos(theta);y=2.*sin(theta);z=t;axes('view',[-37.5,30]);surface(x,y,z)t=0:0.00001:0.001;[t,x]=meshgrid(t);v=10*exp(-0.01*x).*sin(2000*pi*t-0.2*x+pi);axes('view',[-37.5,30]);h=surface(t,x,v);title('v=10*exp(-0.01*x).*sin(2000*pi*t-0.2*x+pi)');xlabel('t'),ylabel('x'),zlabel('v')y=0:0.01:20;x=0:0.01:20;[x,y]=meshgrid(x,y);z=y.^3;axes('view',[-37.5,30]);h=surface(x,y,z);
四
x=0:0.01:2*pi;y1=sin(x);y2=cos(x);y3=tan(x);y4=cot(x);subplot(2,2,1);plot(x,y1);subplot(2,2,2);plot(x,y2);subplot(2,2,3);plot(x,y3);subplot(2,2,4);plot(x,y4);
五
t=linspace(0,2*pi,6);k=t(1:length(t)-1);patch(sin(k),cos(k),1:length(k),'facecolor','interp');colormap summer;axis equal;
六
r=150;a=150;b=150;para1=[a-r,b-r,2*r,2*r];para2=[a-r+300,b-r,2*r,2*r]rectangle('Position',para1,'Curvature',[1 1],'EdgeColor','r')hold on rectangle('Position',para2,'Curvature',[1 1],'EdgeColor','r')axis equal
注：考试范围仅到此，所以simulaition仿真及之后的章节没有作答。由于上次挂了个网址被删啦，若读者需要，请自行查阅相关资料（话说csdn不给返回底稿的吗…）
