MATLAB如何加入滑動條，並能讓滑動條滑動且得到相應數值？（要求代碼，畫滑動條，得數值)

hsl=uicontrol('parent',h,'unit','normalized','style','slider','position',[.01.53 . 3 .04],'min',0,'max',5);

ht1=uicontrol('parent',h,'unit','normalized','style','text','string','0 5','position',[.01 .57 .3.04],'fontsize',10);

ht2=uicontrol('parent',h,'unit','normalized','style','text','position',[.01.71 .3 .03]);

set(hsl,'callback',['a1=get(hsl,''value'');'...

'set(ht2,''string'',a1);']);