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Print time difference in a standard message for logging purposes
log_total_time(begin, end)
A numeric value of the time difference in seconds
A data-time object, signifying the beginning or a process
A data-time object, signifying the end of a process
Other log: log_error(), log_message(), survey_log()
log_error()
log_message()
survey_log()
begin <- Sys.time() # do something end <- Sys.time() + 999 log_total_time(begin, end)
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