clear
clc
hf=figure('Position',[200 200 600 400] ,...
           'Name','Uicontrol1' ,...
           'NumberTitle','off');
ha=axes('Position',[0.4 0.1 0.5 0.7],...
            'Box','on');
hbSin=uicontrol(hf,...
                'Style','pushbutton',...
                'Position',[50,140,100,30],...
                'String','Plot sin(x)',...
                'CallBack',...
                ['subplot(ha);'...
                  'x=0:0.1:4*pi;'...
                  'plot(x,sin(x));'...
                  'axis([0 4*pi -1 1]);'...
                  'xlabel(''x'');'...
                 'ylabel(''y=sin(x)'');'...
                  'if get(hcGrid,''Value'')==1;'... % add
                      'grid on;'...
                   'else;'...
                     'grid off;'...
                   'end;'...   
                ]);  
hbCos=uicontrol(hf,...
                'Style','pushbutton',...
                'Position',[50,100,100,30],...
                'String','Plot cos(x)',...
                'CallBack',...
                ['subplot(ha);'...
                  'x=0:0.1:4*pi;'...
                  'plot(x,cos(x));'...
                  'axis([0 4*pi -1 1]);'...
                'xlabel(''x'');'...
                 'ylabel(''y=cos(x)'');'...
                  'if get(hcGrid,''Value'')==1;'... % add
                'grid on;'...
                  'else;'...
                 'grid off;'...
                  'end;'... 
                ]);             
hbClose=uicontrol(hf,...
                'Style','pushbutton',...
                'Position',[50,60,100,30],...
                'String','Exit',...
                'CallBack','close(hf)');