%exm11432_1.m
clf reset,shg
set(gcf,'unit','normalized','position',[0.1,0.2,0.64,0.35]);
set(gcf,'defaultuicontrolunits','normalized');
set(gcf,'defaultuicontrolfontsize',12);
set(gcf,'defaultuicontrolfontname','隸書');
set(gcf,'defaultuicontrolhorizontal','left');
str='歸一化二階系統階躍響應曲線';
set(gcf,'name',str,'numbertitle','off');		%書寫圖形窗名
h_axes=axes('position',[0.05,0.2,0.6,0.7]);	%定義軸位框位置  
set(h_axes,'xlim',[0,15]);						%設置時間軸長度
str1='當前阻尼比=';
t=0:0.1:10;z=0.5;y=step(1,[1 2*z 1],t);
hline=plot(t,y);
htext=uicontrol(gcf,'style','text',...	%制作靜態說明文本框				<14>
   'position',[0.67,0.8,0.33,0.1],...
   'string',[str1,sprintf('%1.4g\',z)]);
hslider=uicontrol(gcf,'style','slider',...	%創建滑動鍵					<17>
   'position',[0.67,0.65,0.33,0.1],...
   'max',2.02,'min',0.02,...		%設最大阻尼比為2，最小阻尼比為0.02		<19>
   'sliderstep',[0.01,0.05],...%箭頭操縱滑動步長1%，游標滑動步長5%		<20>
   'Value',0.5);					%缺省取阻尼比等于0.5   						<21>
hcheck1=uicontrol(gcf,'style','checkbox',...	%創建峰值檢錄框				<22>
   'string','最大峰值' ,...
   'position',[0.67,0.50,0.33,0.11]);
vchk1=get(hcheck1,'value');						%獲得峰值檢錄框的狀態值		<25>
hcheck2=uicontrol(gcf,'style','checkbox',...	%創建上升時間檢錄框			<26>
   'string','上升時間(0->0.95)',...
   'position',[0.67,0.35,0.33,0.11]);
vchk2=get(hcheck2,'value'); 					%獲得上升時間檢錄框的狀態值	<29>
set(hslider,'callback',[...						%操作滑動鍵,引起回調			<30>
   'z=get(gcbo,''value'');',...				%獲得滑動鍵狀態值				<31>		
   'callcheck(htext,str1,z,vchk1,vchk2)']);	%被回調的函數文件				<32>
set(hcheck1,'callback',[...						%操作峰值檢錄框,引起回調	<33>
   'vchk1=get(gcbo,''value'');',...			%獲得峰值檢錄框狀態值		<34>
   'callcheck(htext,str1,z,vchk1,vchk2)']);	%被回調的函數文件				<35>
set(hcheck2,'callback',[...						%操作峰值檢錄框,引起回調	<36>
   'vchk2=get(gcbo,''value'');',...			%獲得峰值檢錄框狀態值		<37>
   'callcheck(htext,str1,z,vchk1,vchk2)']);	%被回調的函數文件				<38>