Extract time from timestamp?

Question

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

Answer 1

A regular expression will probably be quite efficient for this:

x <- '2008-08-07T17:07:36Z'
x
## [1] "2008-08-07T17:07:36Z"
sub('.*T(.*)Z', '\\1', x)
## [1] "17:07:36"