例7-2.m

这是一个MATLAB7.0基础与提高例题的所有源码

>> t=(-5*pi:pi/40:5*pi)+eps;
>> y=sin(t)./t;
>> hline=plot(t,y);                            %绘制Sa曲线
>> cm=uicontextmenu;                        %创建现场菜单 
>> %制作具体菜单项，定义相应的回调
>> uimenu(cm,'label','green','callback','set(hline,''color'',''g''),')
>> uimenu(cm,'label','blue','callback','set(hline,''color'',''b''),')
>> uimenu(cm,'label','red','callback','set(hline,''color'',''r''),')
>> set(hline,'uicontextmenu',cm)                %将cm现场与Sa曲线相联系