grep -P uses perl-like syntax, which supports lazy regular expression.
Simple enough: it is top -u (write-my-user-id-here) .
Using non-Latin characters in R is not yet intuitive despite many efforts. Part of the reason is that R relies on many background features such as PostScript, which may have inherited legacy features before the advent of Unicode.
gc() does garbage collection in R, and this should save the trouble of quitting, re-running, and loading the previous data.
This is usually an unfortunate event, but it occurs too often. On PBS-type clusters, you can always check the list of jobs that you pushed by writing:
