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y=[ 1 8 6 5 4];plot(y)

h=msgbox('The data is wrong.')

%（1） subplot(2,1,1), x=-3:0.1:3;[x,y]=meshgrid(x);z=(x.^2-2*x).*exp(-x.^2-y.^2-x.*y); mesh(x,y,z); subplot(2,1,2), contour3(x,y,z,15); %三维等值线图 %（2） subplot(2,1,1), [x,y]=meshgrid(-2:0.1:2,-1:0

x=-2*pi:pi/10:2*pi;y1=sin(x);y2=cos(x); figure; % 新建图形窗口 Ha1=axes('Position',[.05 .05 .5 .5]); %设置坐标轴的位置 H1=plot(x,y1);set(H1,'LineWidth',

x=-1:0.05:1;y=-2:0.05:2;[x,y]=meshgrid(x,y); z=log(1+x.^2+2*y.^2);surf(x,y,z)

x = [ 1 2 3 4 5 6];y = [ 2 6 8 7 8 5];stem(x,y, 'filled'); title('Example of a Stem Plot');xlabel('x');ylabel('y');axis([0 7 0 10]);

n=10;dt=2*pi/n;t=0:dt:2*pi; x=sin(t);y=cos(t);fill3(t,x,y,'c');

x=-pi:0.01:pi; y=-pi:0.01:pi; z=10*sin(y).*cos(x); plot3(x,y,z);xlabel('x'),ylabel('y'),zlabel('z');title('plot3');

%方法1: ps.color='red';ps.position=[0,0,300,300];ps.menubar='none'; h_fig=figure(ps) %方法2: h_fig=figure('menubar','none','position',[0,0,300,300], 'color', 'red')

x=(-3*pi:pi/50:3*pi)+eps;y=sin(x).^2+cos(x); lin=plot(x,y); cm=uicontextmenu; %创建控制曲线颜色的快捷菜单，有红色、蓝色和绿色三个选择项 uimenu(cm,'label','Red','callback','set(lin,''color'',''r''),') uimenu(cm,'label','