Hi all,

Is there any command or function to withdraw
a command performed already  in R? For instance, after drawing a line in
existing plot, can I remove the line in the plot? I know I can use a way of
overlapping on the former line so that it looks like a removing the line,
but I'm wondering there is a command to retract the already performed
command.

Thanks.

YN

	[[alternative HTML version deleted]]

