Generate a log record and pass it to the logging system.
logdebug(msg, ..., logger = "")
loginfo(msg, ..., logger = "")
logwarn(msg, ..., logger = "")
logerror(msg, ..., logger = "")the textual message to be output, or the format for the ... arguments
if present, msg is interpreted as a format and the ... values are passed to it to form the actual message.
the name of the logger to which we pass the record
no return value, prints log contents into R console and app log file
A log record gets timestamped and will be independently formatted by each
of the handlers handling it.
Leading and trailing whitespace is stripped from the final message.