Matlab中的绘图工具.ppt

MatLab绘图,二维图形命令Plot的用法,以下的全部内容可以直接拷贝运行.plot(y)-打印2维图例如：y=peaksplot(y)x=-2*pi:0.1*pi:2*piy=sin(x)plot(y),Plot(x,y),x=-2*pi:0.1*pi:2*piy=sin(x).*xplot(x,y),指定各种线型,指定各种标志点,指定线或点的颜色,2维绘图(实例),t=0:pi/20:2*pi;plot(t,sin(t),-.r*)holdonplot(sin(t-pi/2),-mo)plot(sin(t-pi),:bs)holdoff,创建多窗口subplot,income=3.24.15.05.6;outgo=2.54.03.354.9;subplot(2,1,1);plot(income)subplot(2,1,2);plot(outgo),显示图象,X1,map1=imread(forest.tif);X2,map2=imread(trees.tif);subplot(1,2,1),imshow(X1,map1)subplot(1,2,2),imshow(X2,map2)或者用subimage函数显示图象,函数打印,fplot(tanh,-22),其目的是快速地打印出一个已知或自定义的函数图形，默认的范围是-2pi,2pi,打印自定义函数,functionY=myfun(x)Y(:,1)=200*sin(x(:)./x(:);Y(:,2)=x(:).2;,自定义一个函数myfun，保存在硬盘上的名字为myfun.m,fplot(myfun,-2020,subplot(2,2,1);fplot(humps,01)subplot(2,2,2);fplot(abs(exp(-j*x*(0:9)*ones(10,1),02*pi)subplot(2,2,3);fplot(tan(x),sin(x),cos(x),2*pi*-11-11)subplot(2,2,4);fplot(sin(1./x),0.010.1,1e-3),在撰写论文的过程中，经常需要在一个图中包含多个子图，上面包含了4个图,ezplot(f)ezplot(f,min,max),ezplot(x2-y4)-2Pi,2Piezplot(x2-y4,0,1,0,1),一种更简单的处理函数图形的方法,通过图形采样,x,y=ginput(10),打印3D线图-Plot3(x,y,z),t=0:pi/50:10*pi;plot3(sin(t),cos(t),t)gridonaxissquare,张成网格meshgrad,X,Y=meshgrid(-8:.5:8);R=sqrt(X.2+Y.2)+eps;,3D网格图mesh,Z=sin(R)./R;mesh(Z),另外一个3D网格图函数Surf(z),Z=peakssurf(Z)X,Y,Z=peaks(30);surfc(X,Y,Z)colormaphsvaxis(-33-33-105),一个立体球-sphere,k=5;n=2k-1;x,y,z=sphere(n);c=hadamard(2k);surf(x,y,z,c);colormap(110;011)axisequal,Meshcsurfc,增加一个参考平面meshc(peaks)meshz(peaks),换个角度看3D图形,view(1,2,3)看一看隐藏的东西hidden,3D柱状体cylinder,t=0:pi/10:2*pi;X,Y,Z=cylinder(2+cos(t);surf(X,Y,Z)axissquare,Y=round(rand(5,3)*10);subplot(2,2,1)bar(Y,group)titleGroupsubplot(2,2,2)bar(Y,stack)titleStacksubplot(2,2,3)barh(Y,stack)titleStacksubplot(2,2,4)bar(Y,1.5)titleWidth=1.5,条状图函数Bar,饼图,x=130.52.52;explode=01000;pie(x,explode)colormap（jetautumnspring。）,三维饼图,pie3(x,explode),Z=f(x,y)的图象,x=-3:0.05:3y=-3:0.05:3X1,Y1=meshgrid(x,y)z=0.1*sin(X1.2+Y1.2)mesh(x,y,z),图形标注,Label(x)ylabel(y)title(标题)legend(sin,cos,tan),添加浮动标签,x=-10:0.1:10plot(x,sin(x),r+,x,cos(x),bD)legend