Essentially, I want only the hour, minute, and seconds from a column of timestamps I have in R, because I want to view how often different data points occur throughout diffe
I think you are expecting this...
Sys.time() [1] "2016-04-19 11:09:30 IST" format(Sys.time(),format = '%T') [1] "11:09:30"
if you want to give your own timestamp, then use bellow code:
format(as.POSIXlt("2016-04-19 11:02:22 IST"),format = '%T') [1] "11:02:22"