h0=figure('toolbar','none',...'position',[200 150 450 250],...'name','實例36'); x=0:0.5:2*pi; y=sin(x); h=plot(x,y); grid on jb=uicontrol(gcf,'style','popupmenu',...'string',...<strong> 'sin(x)|cos(x)|sin(x)+cos(x)|exp(-sin(x))',...</strong>'position',[250 20 50 20]); set(jb,'value',1) huidiao=[... 'v=get(jb,''value'');,',...'switch v,',...'case 1,',...'delete(h),',...'y=sin(x);,',...'h=plot(x,y);,',...'grid on,',...'case 2,',...'delete(h),',...'y=cos(x);,',...'h=plot(x,y);,',...'grid on,',...'case 3,',...'delete(h),',...'y=sin(x)+cos(x);,',...'h=plot(x,y);,',...'grid on,',...'case 4,',...'delete(h),',...'y=exp(-sin(x));,',...'h=plot(x,y);,',...'grid on,',...'end']; set(jb,'callback',huidiao) set(gca,'position',[0.2 0.2 0.6 0.6]) title('彈出式菜單的使用')

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