实验4、matlab的计算可视化和GUI设计

p345subplot(2,2,1)t1=0:0.1:2;y1=sin(2*pi*t1);plot(t1,y1);title('y=sin(2\pit)')练习：subplot(2,2,2)t2=0:0.1:2;y2=[exp(-t2);exp(-2*t2);exp(-3*t2)];plot(t2,y2)axis([02-0.21.2]);title('y=e-t,y=e-2t,y=e-3t')练习：subplot(2,2,3);t3=[0112234];y3=[0022000];plot(t3,y3);axis([04-0.53]);title('脉冲信号')练习：subplot(2,2,4);t4=0:0.1:2*pi;plot(sin(t4),cos(t4));axis([-1.21.2-1.21.2]);axisequal;title('圆')练习：P346x=0:0.1:20;zeta=0y1=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));plot(x,y1)zeta=0.3;y2=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));holdonplot(x,y2,'r:')zeta=0.5;y3=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));plot(x,y3,'g*')zeta=0.707;y4=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));plot(x,y4,'m-')title('二阶系统曲线')legend('\zeta=0','\zeta=0.3','\zeta=0.5','\zeta=0.707')gridongtext('\zeta=0')gtext('\zeta=0.3')gtext('\zeta=0.5')gtext('\zeta=0.707')ginput(3)zeta=0ans=2.60370.903513.11062.00294.21661.03800246810121416182000.20.40.60.811.21.41.61.82二阶系统曲线=0=0.3=0.5=0.707=0=0.3=0.5=0.707P347h_fig=gcfh_axis=gcah_line1=gcoh_title=get(gca,'title')h_text2=findobj(h_fig,'string','\zeta=0.3')h_fig=1h_axis=151.0018h_line1=1h_title=152.0018h_text2=Emptymatrix:0-by-1set(h_line1,'linewidth',5)set(h_axis,'xgrid','off')set(gca,'ytick',[00.250.51.01.251.51.752.0])set(h_title,'color','red','fontsize',13)set(h_text2,'color','red')???Undefinedfunctionorvariable'h_axis'.P349x=0:0.1:20;y1=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));y2=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));y3=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));y4=1-1/sqrt(1-zeta^2)*exp(-zeta*x).*sin(sqrt(1-zeta^2)*x+acos(zeta));y=[y1;y2;y3;y4];z=[ones(size(x))*0;ones(size(x))*0.3;ones(size(x))*0.5;ones(size(x))*0.707];plot(x,x,x,x)surf(x,x,x,x)???Inputargumentnisundefined.Errorin==zetaat12Z=double(zeta(sym(n),sym(X)));P350x=0:0.3:2*pi;y=sin(x);subplot(2,2,1)bar(x,y,0.5)axis([0,2*pi,-1.2,1.2])subplot(2,2,2)fill(x,y,'r')subplot(2,2,3)stairs(x,y)subplot(2,2,4)stem(x,y)P350guide