Matlab图形绘制经典案例

Matlab图形绘制经典案例（转载）2013-9-101、三维曲线t=0:pi/50:10*pi;plot3(sin(2*t),cos(2*t),t)axissquaregridon2、一窗口多图形t=-2*pi:0.01:2*pi;subplot(3,2,1)plot(t,sin(t))subplot(3,2,2)plot(t,cos(t))subplot(3,2,3)plot(t,tan(t))axis([-pipi-100100])subplot(3,2,4)plot(t,cot(t))axis([-pipi-100100])subplot(3,2,5)plot(t,atan(t))subplot(3,2,6)plot(t,acot(t))3、图形样式、标注、题字(也可以利用菜单直接Insert)x=0:pi/20:2*pi;plot(x,sin(x),'b-.')holdonplot(x,cos(x),'r--')holdonplot(x,sin(x)-1,'g:')holdonplot(x,cos(x)-1)xlabel('x');xlabel('x轴');ylabel('y轴');title('图形样式、标注等');text(pi,sin(pi),'x=\pi');legend('sin(x)','cos(x)','sin(x)-1','cos(x)-1');[x1,y1]=ginput(1)%利用鼠标定位查找线上某点的值x1=2.0893y1=-0.5000gtext('x=2.5')%鼠标定位放置所需的值在线上4、fplot('[sin(x),cos(x),sqrt(x)-1]',[02*pi])M文件：myfun.m内容如下：functiony=myfun(x)y(:,1)=sin(x);y(:,2)=cos(x);y(:,3)=x^(1/2)-1;再运行：fplot('myfun',[02*pi])同样可以得到下图5、[x,y]=fplot('sin',[02*pi]);[x1,y1]=fplot('cos',[02*pi]);plot(x,y,'-r',x1,y1,'-.k')legend('y=sinx','y=cosx')6、x=[-2:0.2:2];y=exp(x)-sin(x);plot(x,y,'-or','linewidth',2)7、画出y1=6(sinx-cosx),y2=x2^x-1的图形x=[-3:0.1:3];y1=6*(sin(x)-cos(x));y2=x.*2.^x-1;plot(x,y1,'-r',x,y2,'-.k','linewidth',2)8、绘制心形图r=2(1-cosθ)的极坐标图形theta=[0:0.01:2*pi];polar(theta,2*(1-cos(theta)),'-k')polar(theta,2*(1-cos(theta)),'-or')9、用双轴对数坐标绘制y=x*3^x-30的图形x=logspace(-3,3);y=x.*3.^x-30;loglog(y,'-or','linewidth',2);gridon10、绘制数据向量的单轴对数坐标图形x=[1:50];y=[1:50];semilogx(x,y,'-*b')%绘制横轴为对数坐标%纵轴为线性坐标gridonsemilogy(x,y,'-*b')%绘制纵轴为对数坐标%横轴为线性坐标gridon11、绘制矩阵的条形图，并求出句柄属性值向量。A=[123;456;789];h=bar(A)h=171.0031174.0026176.002612、绘制矩阵的水平条形图。y=[32-221;-12371;72-352];x=[1:3];barh(x,y)13、绘制矩阵的面积图。y=[32-221;-13372;-75593];area(y)14、绘制矩阵的二维饼图x=[123;456;789];explode=[010101010];pie(x,explode)15、自行确定数据向量，绘制其散点图。x=rand(1,100);y=randn(1,100);scatter(x,y,20)16、自行确定数据，绘制其柱形图。x=[-2:0.01:4];y=randn(1131,1);hist(y,x)17、绘制y=sinx在[0,2*pi]上的误差图。x=[0:pi/20:2*pi];y=sin(x);E=std(y)*ones(size(x));%条形控制errorbar(x,y,E)18、绘制火柴杆图。x=[11.52;33.54;55.56];y=[432;489;273];stem(x,y,'fill')%fill意思是“实心点”19、绘制羽列图。U=[-90:5:90]*pi/180;%建立等间距数据V=2*ones(size(U));%根据U建立数据[U,V]=pol2cart(U,V);转换数据为直角坐标形式feather(U,V)20、同一窗口绘制和在[0,30]上的图形。x=[0:0.01:30];y1=50*exp(-0.05*x).*sin(x);y2=0.5*exp(-0.5*x).*cos(x);plotyy(x,y1,x,y2,'plot')%plotyy(x,y1,x,y2,'plot')表示：用左侧y标度绘制（x,y1）用右侧y标度绘制（x,y2）21、绘制8阶魔方矩阵的等值线图和阶梯图。A=magic(8);contour(A)%绘制等值线图stairs(A)%绘制阶梯图22、绘制玫瑰花图。theta=rand(1,200)*2*pi;rose(theta,25)23、绘制罗盘图。x=rand(20,1);y=randn(20,1);compass(x,y)24、绘制函数的梯度场矢量图。[x,y]=meshgrid([-2:0.1:2]);%建立栅格点数据向量z=3.*x.*y*exp(-x.^2-y.^2)-1;%计算函数值向量[u,v]=gradient(z,0.2,0.2);%计算梯度值向量quiver(x,y,u,v,2)%绘制梯度场矢量图25、给定向量x,y生成网格矩阵。x=[1234];y=[1011121314];[U,V]=meshgrid(x,y)U=12341234123412341234V=101010101111111112121212131313131414141426、生成一个5阶高斯分布矩阵，并给出相应的x,y向量矩阵。[X,Y,Z]=peaks(5)X=-3.0000-1.500001.50003.0000-3.0000-1.500001.50003.0000-3.0000-1.500001.50003.0000-3.0000-1.500001.50003.0000-3.0000-1.500001.50003.0000Y=-3.0000-3.0000-3.0000-3.0000-3.0000-1.5000-1.5000-1.5000-1.5000-1.5000000001.50001.50001.50001.50001.50003.00003.00003.00003.00003.0000Z=0.00010.0042-0.2450-0.0298-0.0000-0.00050.3265-5.6803-0.44050.0036-0.0365-2.77360.98103.26950.0331-0.00310.47847.99661.18530.00440.00000.03120.29990.03200.000027、在-4=x=4,-4=y=4区域上绘制z=x^2+y^2的三维网格图。[x,y]=meshgrid(-4:0.125:4);z=x.^2+y.^2;meshc(x,y,z)28、绘制高斯分布函数的网格图。[x,y]=meshgrid(-3:0.125:3);z=peaks(x,y);meshz(x,y,z)29、用surf绘制高斯分布函数的曲面图。[x,y]=meshgrid(-3:0.125:3);z=peaks(x,y);surf(x,y,z)30、绘制曲线图。t=[0:pi/200:10*pi];x=2*cos(t);y=3*sin(t);z=t.^2;plot3(x,y,z)31、利用peaks函数产生的数据绘制其带形图。[x,y]=meshgrid([-2*pi:pi/5:2*pi],[-2:1/5:2]);z=peaks(x,y);ribbon(y,z)32、绘制三维饼图。A=[123;456;789];ex=[100;400;080];pie3(A,ex)33、在各种style参数的条件下绘制矩阵的三维条形图。z=[123;456;789];bar3(z,'detached')title('bar3函数以detached参数绘制A=[123;456;789]的条形图')bar3(z,'grouped')title('bar3函数以grouped参数绘制A=[123;456;789]的条形图')bar3(z,'stacked')title('bar3函数以stacked参数绘制A=[123;456;789]的条形图')34、绘制柱形图。t=[0:pi/50:2*pi];[x,y,z]=cylinder(t.*sin(t));surf(x,y,z)cylinder(t.^2)title('cylinder(t^2)绘制的柱形图')35、绘制三维散点图。x=rand(500,1);y=randn(500,1);z=randn(500,1);scatter3(x,y,z,'p','r')36、绘制三维火柴杆图。x=[1:0.5:20];y=sqrt(x);z=sqrt(x.^2+y.^2);stem3(x,y,z,'filled')37、绘制高斯分布函数的三维瀑布图。[x,y]=meshgrid(-4:0.05:4);z=peaks(x,y);waterfall(x,y,z)38、绘制等值线图。[x,y]=meshgrid(-3:0.1:3);z=2-x.^2-y.^2;contour3(z,20)39、绘制一个球面。[x,y,z]=sphere(40);surf(x,y,z)40、绘制三角形网格图和三角形表面图。[x,y]=meshgrid(-3:0.5:3);z=x.*exp(-x.^2-y.^2);tri=delaunay(x,y);%建立三角形网格trimesh(tri,x,y,z)trisurf(tri,x,y,z)41、绘制一个三维彗星图。t=[-3*pi:pi/100:3*pi];x=3.*cos(t);y=2.*sin(t);z=t.^2;comet3(x,y,z)42、绘制曲面z的表面法向量向量图。[x,y]=meshgrid([-3:0.2:3],[-2:0.5:2]);z=x.*exp(-x.^2-y.*2);[u,v,w]=surfnorm(x,y,z);%计算表面法向向量quiver3(x,y,z,u,v,w,1.2)%绘制三维向量图holdonsurf(x,y,z)holdoff43、绘制空间立体在-2=x