r - How to convert decimal time to time format -


this question has answer here:

i calculate difference between 2 time-sets. can this, difference in decimals , know how convert them format in "minutes:second".

so, have minutes , seconds characters:

video_begin <- c("8:14", "4:47", "8:27", "4:59", "4:57", "7:51", "6:11", "5:30") video_end <- c("39:08", "47:10", "49:51", "44:31", "39:41", "47:12", "40:13", "46:52")

i convert them time values as.posixct, make df , add difference third column, easy peasy...

video_begin <- as.posixct(video_begin, format = "%m:%s") video_end <- as.posixct(video_end, format = "%m:%s") video <- data.frame(video_begin, video_end) video$video_duration <- video_end - video_begin

and video:

  video_begin         video_end            video_duration 1 2017-09-12 00:08:14 2017-09-12 00:39:08  30.90000 mins 2 2017-09-12 00:04:47 2017-09-12 00:47:10  42.38333 mins 3 2017-09-12 00:08:27 2017-09-12 00:49:51  41.40000 mins 4 2017-09-12 00:04:59 2017-09-12 00:44:31  39.53333 mins 5 2017-09-12 00:04:57 2017-09-12 00:39:41  34.73333 mins 6 2017-09-12 00:07:51 2017-09-12 00:47:12  39.35000 mins 7 2017-09-12 00:06:11 2017-09-12 00:40:13  34.03333 mins 8 2017-09-12 00:05:30 2017-09-12 00:46:52  41.36667 mins

how change format of video$video_duration decimal same format in video$video_begin , video$video_end: "minutes:seconds" (i don't care day, month, year , hour)?

i tried:

video$video_duration <- as.posixct(video$video_duration, format = "%m:%s")

and

strptime(video$video_duration, format="%m:%s")

but nah...

i found answers i'm not satisfied them:

how convert decimal posix time

algorithm convert text time decimal time

isn't there more... handy , easier way it?

thanks!

another option:

library(lubridate) video$video_duration <- as.numeric(video_end - video_begin, units = "secs") video$video_duration  <- seconds_to_period(video$video_duration)            video_begin           video_end video_duration 1 2017-09-12 00:08:14 2017-09-12 00:39:08        30m 54s 2 2017-09-12 00:04:47 2017-09-12 00:47:10        42m 23s 3 2017-09-12 00:08:27 2017-09-12 00:49:51        41m 24s 4 2017-09-12 00:04:59 2017-09-12 00:44:31        39m 32s 5 2017-09-12 00:04:57 2017-09-12 00:39:41        34m 44s 6 2017-09-12 00:07:51 2017-09-12 00:47:12        39m 21s 7 2017-09-12 00:06:11 2017-09-12 00:40:13         34m 2s 8 2017-09-12 00:05:30 2017-09-12 00:46:52        41m 22s

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