finding timestamp difference for a day in R -



finding timestamp difference for a day in R -

i have info in interval of 15 minutes , need find time difference between next record , current record using r not able do. can help here?

timestamp id timediff 07/29/2014 10:15 189252 0:15 07/29/2014 10:45 189252 0:30 07/29/2014 11:00 189252 0:15 07/29/2014 11:15 189252 0:15 07/29/2014 11:30 189252 0:15 07/29/2014 11:45 189252 0:15 07/29/2014 12:00 pm 189252 0:15 07/29/2014 12:15 pm 189252 0:15 07/29/2014 12:30 pm 189252 0:15 07/29/2014 01:00 pm 189252 0:30 07/29/2014 01:15 pm 189252 0:15 07/29/2014 01:30 pm 189252 0:15 07/29/2014 01:45 pm 189252 0:15

this straightforward long info in appropriate date-time format:

> foo <- as.posixct(c("07/29/2014 10:15","07/29/2014 10:45"), format="%m/%d/%y %h:%m") > foo [1] "2014-07-29 10:15:00 cest" "2014-07-29 10:45:00 cest" > diff(foo) time difference of 30 mins

look @ ?as.posixct , ?strptime.

r

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