h0=figure('toolbar','none',...
    'position',[198 56 408 468],...
    'name','my second gui');
h1=axes('parent',h0,...
    'position',[0.15 0.45 0.7 0.5],...
    'visible','on');
x=0:0.1:2*pi;
k=plot(x,sin(x));
xlabel('自變量X');
ylabel('函數(shù)值Y');
title('圖形色彩改變');
p1=uicontrol('parent',h0,...
    'style','pushbutton',...
    'backgroundcolor','r',...
    'position',[60 100 50 30],...
    'callback','set(k,''color'',''r'')');
p2=uicontrol('parent',h0,...
    'style','pushbutton',...
    'backgroundcolor','g',...
    'position',[170 100 50 30],...
    'callback','set(k,''color'',''g'')');
p3=uicontrol('parent',h0,...
    'style','pushbutton',...
    'backgroundcolor','b',...
    'position',[280 100 50 30],...
    'callback','set(k,''color'',''b'')');
p4=uicontrol('parent',h0,...
    'style','pushbutton',...
    'backgroundcolor',[1 1 1],...
    'fontsize',20,...
    'fontweight','demi',...
    'string','關(guān)閉',...
    'position',[150 30 80 60],...
    'callback','close');
t1=uicontrol('parent',h0,...
    'style','text',...
    'string','紅色',...
    'fontsize',12,...
    'fontweight','demi',...
    'position',[60 120 50 20]);
t2=uicontrol('parent',h0,...
    'style','text',...
    'string','綠色',...
    'fontsize',12,...
    'fontweight','demi',...
    'position',[170 120 50 20]);
t3=uicontrol('parent',h0,...
    'style','text',...
    'string','藍(lán)色',...
    'fontsize',12,...
    'fontweight','demi',...
    'position',[280 120 50 20]);