how to reuse the line after delete or hide

Question

singh 2015-6-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223228-how-to-reuse-the-line-after-delete-or-hide

回答： Walter Roberson 2015-6-10

suppose i plot line

BK=line([X,DCH_coord(1)],[Y,DCH_coord(2)],'marker','*','MarkerSize',10); 
BK2=line([XX,DCH_coord(1)],[YY,DCH_coord(2)],'marker','*','MarkerSize',10);
 for i=1:4
%sender to receiver
 set(BK,'color','r','LineWidth',3),pause(.4)
 set(BK,'color','k','LineWidth',3),pause(.4)
 set(BK2,'color','r','LineWidth',3),pause(.4)
 set(BK2,'color','k','LineWidth',3),pause(.4)
delete(BK);                 %for deleting the line 
delete(BK2);                 % for deleting the line
%reverse receiver to sender
 set(BK2,'color','r','LineWidth',3),pause(.4)
 set(BK2,'color','k','LineWidth',3),pause(.4)
 set(BK,'color','r','LineWidth',3),pause(.4)
 set(BK,'color','k','LineWidth',3),pause(.4)
delete(BK2);                 %for deleting the line 
delete(BK);                 % for deleting the line
  end

after deleting first tym in the for loop if i again access BK and BK2 then it show error how to solve it please help me.if not delete then plz give me another solution to hide the lines after sender to receiver part and after receiver to sender.

thanks in advance.