实例40:UIMENU菜单的应用
h0=figure('toolbar','none',...
'position',[200 150 450 250],......'if b==0,',...
'h7=errordlg(''除数不能为0!'',''error'',''on'');,',......'value',0,......'visible','on');
x=0:0.1:2*pi;
k=plot(x,sin(x));
xlabel('自变量X');
ylabel('函数值Y');
title('图形色彩改变');
p1=...'if imag(z(k,j))~=0,',...
'z1(k,j)=0;,',...
'end,',...