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%例23-18 图例 x=0:0.02*pi:2*pi; y1=sin(x); y2=cos(x); y3=sin(3*x).*cos(x); plot(x,[y1;y2;y3]) axis([0 2*pi -1.5 1.5]) set(gca,'XTick',[0 pi 2*pi],'XTickLabel',{'0','pi','2pi'}) legend('sin(x)','c

%例23-36 函数绘图 subplot(2,2,1) fplot(@sin,[0 2*pi]) title('y=sin(x)') subplot(2,2,2) f='cos(x)+sin(3*x)'; ezplot(f,[-2*pi 2*pi -3 3]) title('y=cos(x)+sin(3x)') subplot(2,2,3) ezpolar('2+3*sin(t)

%例23-12 双纵轴绘图 t=0:0.02*pi:7; x=cos(t); y=exp(t); [ax,ha,hb]=plotyy(t,x,t,y) %句柄都是一些小数数值，用于标识各个对象 set(ax(1),'XTick',[0 pi 2*pi],'XTickLabel',{'0','pi','2pi'}) set(ha,'LineStyle','--','Color','r')

%例24-17 设置坐标轴 %Ex24-17 set axis close all subplot(1,3,1) ezsurf(@(t,s)(sin(t).*cos(s)),@(t,s)(sin(t).*sin(s)),@(t,s)cos(t),[0,2*pi,0,2*pi]) axis auto;title('auto') subplot(1,3,2) ezsurf(@(t,s)(

5.自适应陷波器的仿真程序： N=400; %总采样长度 t=0:N-1; %时间的变化范围 s=sin(2*pi*t/20); %输入信号 A=0.5; %干扰信号的幅值 fai=pi/3;%干扰信号的相移 n=A*cos(2*pi*t/10+fai);%干扰信号 x=s+n;%信号混合 subplot(2,2,1);%作第一子图 plot(t,s); subplot(2,2

syms t tao; y=2/3*exp(-t/2)*cos(sqrt(3)/2*t); %定义符号函数 s=subs(int(y,t,0,tao),tao,t); %获得积分函数 subplot(1,2,1),ezplot(y,[0,4*pi]);grid subplot(1,2,2),ezplot(s,[0,4*pi]);grid title('s = \inty(t)dt')

clf;t=0:pi/50:2*pi;y=sin(t);plot(t,y);axis([0,2*pi,-1.2,1.2]) text(pi/2,1,'\fontsize{16}\leftarrow\itsin(t)\fontname{隶书}极大值')

%exm06021_4.m th = [0:pi/50:2*pi]'; a = [0.5:.5:4.5]; X = cos(th)*a; Y = sin(th)*sqrt(25-a.^2); shg plot(X,Y) axis('equal'),xlabel('x'), ylabel('y') title('A set of Ellipses')

% exm10034_1.m t=(-3*pi:pi/50:3*pi)+eps; y=sin(t)./t; hline=plot(t,y); cm=uicontextmenu; % uimenu(cm,'label','Red','callback','set(hline,''color'',''r''),') uimenu(cm,'label','Blue','callback',

%exm06021_4.m th = [0:pi/50:2*pi]'; a = [0.5:.5:4.5]; X = cos(th)*a; Y = sin(th)*sqrt(25-a.^2); shg plot(X,Y) axis('equal'),xlabel('x'), ylabel('y') title('A set of Ellipses')