pend — Close all plotting windows
pend is used to end the plotting session. This is useful
when you have many plot windows open and do not wish to use
pclose on each one induvidually.
Note: You can begin plotting again by using pstart.
This is not an built-in function. This function
is normally loaded on start-up from the plot.r file in the
standard rlib directory. Use of the -r option, incorrectly
setting the RLAB_LIB_DIR environmental variable, or modifying
plot.r may make this function unavailable.
Subsections