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《刘卫国版matlab程序设计与应用课后实验六八九》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、实验六高层绘图操作%第一题：程序代码如下：x=linspace(0,2*pi,101);y=(0.5+3*sin(x)./(1+x.^2)).*cos(x);plot(x,y)%第二题：%（1）程序代码如下：x=linspace(-2*pi,2*pi,100);y1=x.^2;y2=cos(2*x);y3=y1.*y2;plot(x,y1,'b-',x,y2,'r:',x,y3,'y--');text(4,16,'leftarrowy1=x^2');text(6*pi/4,-1,'downarrowy2=cos(2*x)');text(-1.5*pi,-
2、2.25*pi*pi,'uparrowy3=y1*y2');%（2）程序代码如下：x=linspace(-2*pi,2*pi,100);y1=x.^2;y2=cos(2*x);y3=y1.*y2;subplot(1,3,1);%分区plot(x,y1);title('y1=x^2');%设置标题subplot(1,3,2);plot(x,y2);title('y2=cos(2*x)');subplot(1,3,3);plot(x,y3);title('y3=x^2*cos(2*x)');%（3）程序代码如下：x=linspace(-2*pi,2*pi,20
3、);y1=x.^2;subplot(2,2,1);%分区bar(x,y1);title('y1=x^2的条形图');%设置标题subplot(2,2,2);stairs(x,y1);title('y1=x^2的阶梯图');subplot(2,2,3);stem(x,y1);title('y1=x^2的杆图');subplot(2,2,4);fill(x,y1,'r');%如果少了'r'则会出错title('y1=x^2的填充图');%其他的函数照样做。%第三题程序代码如下：x=-5:0.01:5;y=[];%起始设y为空向量forx0=xifx0<=0%不能
4、写成x0=<0y=[y,(x0+sqrt(pi))/exp(2)];%将x对应的函数值放到y中elsey=[y,0.5*log(x0+sqrt(1+x0^2))];endendplot(x,y)%第四题：程序代码如下：a=input('a=');b=input('b=');n=input('n=');t=-2*pi:0.01:2*pi;r=a*sin(b+n*t);polar(t,r)a=8b=6n=12%第五题程序代码如下：x=linspace(-5,5,21);y=linspace(0,10,31);[x,y]=meshgrid(x,y);%在[-5,5
5、]*[0,10]的范围内生成网格坐标z=cos(x).*cos(y).*exp(-sqrt(x.^2+y.^2)/4);subplot(2,1,1);surf(x,y,z);subplot(2,1,2);contour3(x,y,z,50);%其中50为高度的等级数，越大越密%第六题程序代码如下：ezsurf('cos(s)*cos(t)','cos(s)*sin(t)','sin(s)',[0,0.5*pi,0,1.5*pi]);%利用ezsurf隐函数shadinginterp%进行插值着色处理实验八数据处理与多项式运算%第一题%(1)程序代码如下：A=
6、rand(1,30000);b=mean(A)std(A,0,2)%(2)max(A)min(A)%(3)n=0;fori=1:30000ifA(i)>0.5n=n+1;endendp=n/30000b=0.5026ans=0.2899ans=1.0000ans=1.5584e-005p=0.5044%第二题%(1)程序代码如下：A=45+51*rand(100,5);[Y,U]=max(A)[a,b]=min(A)Y=95.912395.610395.895695.720995.8496U=8763805394a=45.617945.179745.5863
7、45.014945.1109b=678867874%(2)程序代码如下：m=mean(A)s=std(A)m=69.567568.057467.049871.778571.6872s=14.075014.561715.004614.984214.8491%(3)sum(A,2)[Y,U]=max(ans)[a,b]=min(ans)ans=329.5253355.2437361.9882382.9321321.6361335.0289322.4588378.5933349.8230331.9004429.4166384.8956335.0518314.434
8、2347.8612362.8625327.33194
