I am trying to remove the seconds from a column of hours in POSIXct format:
#\"2016-04-02 10:33:45 COT\" \"2016-04-02 22:19:24 COT\" #\"2016-04-09 17:47:13 C
you can use round.POSIXt:
round(Sys.time(), units = "mins") #"2017-01-30 11:20:00 CET"