Extracting time from POSIXct

Question

How would I extract the time from a series of POSIXct objects discarding the date part?

For instance, I have:

times <- structure(c(1331086009.5009         


        

Answer 1

Many solutions have been provided, but I have not seen this one, which uses package chron:

hours = times(strftime(times, format="%T"))
plot(val~hours)

(sorry, I am not entitled to post an image, you'll have to plot it yourself)