[R] 2 questions : format and hh:mm

[Gabor Grothendieck]

Bruno Cutayar <bcutayar <at> lfdj.com> writes:

>  2- i search to generate a serie of hours and minutes on 24h :
> "00:00" , "00:01", "00:02", "00:03", ...,...,  "23:59"

Using the chron package, if min is sequence of chron times, e.g. 

   require(chron)
   m <- 24 * 60  # minutes in a day
   min <- times(seq(0,m-1)/m)

then you can format them as hh:mm:ss like this:

   format(min)

or as hh:mm like this:

   substring(min, 1, 5)