1、subplot(221)stairs(x,y)title(a) stairs)subplot(222)compass(cos(x),y)(b) compassy1=randn(1,10000);subplot(223)hist(y,20)(c) histsubplot(224)u,v=meshgrid(-2:0.2:2,-1:0.15:1);z=u.*exp(-u.2-v.2);px,py=gradient(z,0.2,0.15);contour(u,v,z)hold onquiver(u,v,px,py)hold offaxis image(d) quiver2误差限图绘制函数y=sin(x
2、);L=rand(1,length(x)/10;U=rand(1,length(x)/10;errorbar(x,y,L,U,:3.复数图绘制函数z=2+3i,2+2i,1-2i,4i,-3; x=2,2,1,0,-3; y=3,2,-2,4,0;subplot(1,2,1),compass(z,rsubplot(1,2,2),feather(x,y,b4.条形图与直方图绘制函数x=-pi:pi;subplot(2,1,1), H=bar(x,y);xx=get(H,xdata);yy=get(H,ydatasubplot(2,1,2)plot(xx,yy);四、回答问题:(回答实验指导书中提
3、出的问题)五、思考题:1. t=0:pi/50:2*pi;y1=1.0013*t.2;polar(t,y1);y2=cos(3.5*t);polar(t,y2);y3=sin(t)./t;polar(t,y3);y4=1-cos(7*t).3;polar(t,y4)2.第三章习题:1. x=0:y1=log2(x),y2=exp(x);plot(x,y1,x,y2);axis(0 10 -10 10),grid on对数函数和指数函数gtext(y1=log_2xy2=e2xlabel(x),ylabel(y3. x=0:10;y=exp(x+5)+x.3;semilogx(x,y);axis
4、(1 10)4. figure(1)x,y=meshgrid(-3:0.124:3);z=peaks(x,y);mesh(x,y,z);多峰函数x=-0.5*pi+1:0.5*pi+1;y=tan(x);plot(x,y),grid on;axis(0 pi -10 10);正切函数plot(x,y);正弦函数x=-0.5*pi:3/2*pi;y=cos(x);余弦函数5. x=-10:0.012:20;y1=2*x+5;y2=x.2-3*x+1figure(1)subplot(211)plot(x,y1),grid on;axis(-10 20 0 100)y1=2x+5subplot(212)plot(x,y2),grid on;y2=x2-3x+16.7. 8.9.10.六、遇到的问题及解决:不知如何给饼图添加标注,最后在老师的讲解下,学会了。 七、体会:难点是三维图形的绘制,学会了用MATLAB制作饼图和直方图,这将有利于以后的学习,以及数据的分析。