======Problem 7 Updated=======
h=[20,3,2008];a='我的'; b='生日'; x=0:0.01:3; y=x.^2; xx=[1,2] ;
hFig=figure('Name',[a,b,'是',num2str(h(3)),'年',num2str(h(2)),'月',num2str(h(3)),'日']);
set(get(hFig,'Children'),'YTicklabel',[1,2],'XTicklabel',[1,4])
hold on;
%画出辅助线:用实线画:(0,y(x=xx(1)))-(1,y(x=xx(1)))-(1,0) , 用虚线画:(0,y(x=xx(2)))-(2,y(x=xx(2)))-(2,0)
plot([0,1,1],[y(x==xx(1)),y(x==xx(1)),0],'-',[0,2,2],[y(x==xx(2)),y(x==xx(2)),0],'--'),
plot([1,y(x==xx(1))],[1,y(x==xx(2))],'.','Markersize',5)
%标注点:(y(x==xx(1)),y(x==xx(2)))和(2,y(x=2))
set(get(hFig,'Children'),'XTick',[1,2],'YTick',[y(x==xx(1)),y(x==xx(2))])
[此贴子已经被作者于2008-1-7 23:13:10编辑过]