matlab 获取edit,怎样获取edit控件里的数据

运行代码：

H=axes('unit','normalized','position',[0,0,1,1],'visible','off');

set(gcf,'currentaxes',H);

text(0.12,0.93,'\fontname{楷书}正弦曲线','fontsize',13);

H_fig=get(H,'parent');

set(H_fig,'unit','normalized','position',[0.1 0.2 0.7 0.4]);

h_axes=axes('parent',H_fig,...

'unit','normalized','position',[0.1 0.14 0.5 0.7],...

'xlim',[0 15],'ylim',[0 1.8],'fontsize',8);

h_text=uicontrol(H_fig,'style','text',...

'unit','normalized','position',[0.67 0.74 0.25 0.14],...

'horizontal','left','string',{'输入参数','z='});

h_edit=uicontrol(H_fig,'style','edit',...

'unit','normalized','position',[0.67 0.59 0.25 0.14],...

'horizontal','left',...

'callback',['z=str2num(get(gcbo,"string"));',...

'plot(z,sin(z));',...

'hold off,']);

h_push1=uicontrol(H_fig,'style','push',...

'unit','normalized','position',[0.67 0.37 0.12 0.15],...

'string','grid on','callback','grid on');

h_push2=uicontrol(H_fig,'style','push',...

'unit','normalized','position',[0.67 0.15 0.12 0.15],...

'string','grid off','callback','grid off');

uimenu('Label','grid','callback','grid on,set(gca,"box","on"),')

得到如下图所示界面，在文本框中输入0:0.01:1，然后回车，为什么程序会报错：

??? Error: Missing variable or function.

??? Error while evaluating uicontrol Callback.

难道0:0.01:1没有传给变量z？

各位大侠请帮小弟看看.....小弟感激不尽

[本帖最后由 abrahamliu1986 于 2009-4-2 23:03 编辑]

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2009-4-2 23:03 上传