科学计算与数据处理实验报告
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0.2147 0.3243 0.5189 0.8216 1.0250 0.8292 0.5345 0.3489 0.2500
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0.1995 0.1769 0.1730 0.1838 0.2071 0.2385 0.2673 0.2770 0.2584
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0.2200 0.1775 0.1404 0.1112 0.0891 0.0725 0.0599 0.0502 0.0427
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0.0367 0.0319 0.0280 0.0248
>> plot(n,y,'*')
（2）plot、subplot、axis、set、legend、xlabel、ylabel、zlabel、title、text、grid、box、hold、plotyy、fplot函数演示
>> x=0:0.1:5;
>> y=sin(x);
>> z=cos(x);
>> h=tan(x);
>> subplot(2,1,1);
>> plot(x,y);
>> subplot(2,1,2);
>> plot(x,z);
>> axis([0 4 0 20]);
>> h=plot(x,y);
>> set(h,'color','b');
>> set(gca,'XGrid','on','YGrid','off');
>> set(gca,'color','g');
>> clear
>> x=0:0.05:10;
>> plot(x,sin(x),'*b',x,cos(x),'+r',x,tan(x)./100,'+'); >> legend('sin','cos','tan');
>> clear
>> x=0:0.05:15;
>> plot3(x,sin(x),cos(x),'b','linewidth',1); >> xlabel('X');
>> ylabel('Y');
>> zlabel('Z');
>> title('三维曲线')
>> text(1,1,'图像示例')
>> grid('on')
>> box on
>> hold on
>> plot3(x,x.^2,x.^(1./2))
>> plot3(x,sin(x),cos(x),'b','linewidth',5); >> clear
>> x = 0:0.01:20;
>> y1 = 200*exp(-0.05*x).*sin(x);
>> y2 = 0.8*exp(-0.5*x).*sin(10*x);
>> [AX,H1,H2] = plotyy(x,y1,x,y2,'plot');
（3）实验演示plot3、mesh、surf函数
Plot3函数已在上面演示。
>> clear
>> z=peaks(25);
>> subplot(1,2,1);
>> mesh(z)
>> title('mesh函数');
>> subplot(1,2,2);
>> surf(z)
>> title('surf函数');
（4）实验演示面域图（area）、直方图（bar、barh、bar3、bar3h）、饼图（pie、pie3）、散点图（scatter、scatter3、plotmatrix）
>> x=magic(6);
>> area(x);
>> clear
>> x=0:0.2:2*pi;
>> y=sin(x);
>> subplot(2,2,1); >> bar(y);
>> title('bar');
>> subplot(2,2,2); >> barh(y);
>> title('barh'); >>Y=[1,2,3;4,5,6]; >> subplot(2,2,3); >> bar3(Y);
>> title('bar3'); >> subplot(2,2,4); >> bar3h(Y);
>> title('bar3h');
>> x=[1 2 3 4 5 6 7]; >> y=[0 0 0 1 0 0 0]; >> subplot(1,2,1); >> pie(x,y);
>> subplot(1,2,2); >> pie3([4 3 6 8 9]);
>> clear
>> a=rand(200,1);
>> b=rand(200,1);
>> c=rand(200,1);
>> scatter(a,b,100,c,'p')
>> clear
>> x=[1:10];
>> y=x+rand(size(x));
>> z=rand(size(x))+rand(size(y)); >> scatter3(x,y,z,'filled');
>> clear
>> x=randn(100,2);
>> plotmatrix(x)
（5）实验演示用view、rotate、colordef、colormap、shading、light、lighting、material、surfl等函数对三维图形进行精细控制的方法
>> clear
>> z=peaks(25);
>> colordef black;
>> colormap hot;
>> shading interp;
>> surfl(z)
