matlab程序设计(刘卫国)实验六

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1、1题x=linspace(0,2*pi,101);y=(0.5+(3*sin(x))/(1+x.^2))*cos(x);plot(x,y)2题x=linspace(0,2*pi,100);y1=x.^2;y2=cos(2*x);y3=y1.*y2;subplot(2,2,1);plot(x,y1,'g',x,y2,'r',x,y3,'c')title('第（1）小题不同颜色绘图')subplot(2,2,2);plot(x,y1);title('第（2）小题（子图1）')subplot(2,2,3

2、);plot(x,y2);title('（子图2）')subplot(2,2,4);plot(x,y3);title('（子图3）')figure(2)subplot(4,4,1);bar(x,y1);title('y1条形图');subplot(3,4,2);stem(x,y1);title('y1杆图');subplot(3,4,3);stairs(x,y1);title('y1阶梯图');subplot(3,4,4);fill(x,y1,'g');title('y1填充图');subplot

3、(3,4,5);bar(x,y2);title('y2条形图');subplot(3,4,6);stem(x,y2);title('y2杆图');subplot(3,4,7);stairs(x,y2);title('y2阶梯图');subplot(3,4,8);fill(x,y2,'g');title('y2填充图');subplot(3,4,9);bar(x,y3);title('y3条形图');subplot(3,4,10);stem(x,y3);title('y3杆图');subplot(3

4、,4,11);stairs(x,y3);title('y3阶梯图');subplot(3,4,12);fill(x,y3,'g');title('y3填充图');3题x1=linspace(-5,0,50);x2=linspace(0,5,50);y1=(x1+sqrt(pi))/exp(2);y2=1/2*log(x2+sqrt(1+x2.^2));plotyy(x1,y1,x2,y2)gridon4题theta=0:0.01:2*pi;c=1;for(a=4:5)for(b=2:3)for(n

5、=3:4)rho=a*sin(b+n*theta);subplot(2,4,c)polar(theta,rho,'g')c=c+1;endendend由图片分析得：a影响曲线的半径，b影响曲线的角度，n影响曲线的周期5题x=linspace(-5,5,31);y=linspace(0,10,21);[x,y]=meshgrid(x,y)a=sqrt(x.^2+y.^2);z=cos(x).*cos(y).*exp(-a/4);subplot(1,2,1);surf(x,y,z);shadingin

6、terpview(-27.5,30)subplot(1,2,2);contour3(x,y,z,50,'g')6题s=linspace(0,pi/2,100);t=linspace(0,pi*3/2,100);[s,t]=meshgrid(s,t)x=cos(s).*cos(t);y=cos(s).*sin(t);z=sin(s);surf(x,y,z)shadinginterp;