Name of logfile (character or writeable connection)
loglevel
Minimum priority level (numeric, optional)
append
Append to logfile? (logical, optional)
sink
Send all console output to logfile? (logical, optional)
Value
Invisible fully-qualified name of log file.
Details
Open a new logfile. Messages will only appear in the logfile
if their level exceeds the log's loglevel;
this allows you to easily change the amount of detail being logged.
Re-opening a logfile will erase the previous output unless append
is TRUE. Opening a new logfile when one is already open will temporarily
switch logging to that new file.
If sink is TRUE, all screen output will be captured (via sink).