R語言記錄程序運行的時間

f <- function(start_time) { start_time <- as.POSIXct(start_time) dt <- difftime(Sys.time(), start_time, units="secs") # Since you only want the H:M:S, we can ignore the date... # but you have to be careful about time-zone issues format(.POSIXct(dt,tz="GMT"), "%H:%M:%S") }

how to use:

time1<-Sys.time()
...

f(time1)