Extracting 2 digit hour from POSIXct in R

Question

I would like to extract the hour from a POSIXct time in R, but retrieve the 2 digit answer.

For example,

test=as.POSIXct(\"2015-03-02 03         


        

Answer 1

Try to do this:

strftime(test, format="%H")

to extract hours and

strftime(test, format="%m")

for month