Re: [R] Counting session days

2009-02-09 Thread Gustaf Rydevik
On Mon, Feb 9, 2009 at 4:57 PM, wrote: > > hi, > > I have some session data in a dataframe, where each session is recorded with > a start and a stop date. Like this: > > session_start session_stop > === > 2009-01-03 2009-01-04 > 2009-01-01 2009-01-05 > 2009-01-02

Re: [R] Counting session days

2009-02-09 Thread Gabor Grothendieck
Try this: > dateseq <- function(i) seq(DF[i, 1], DF[i, 2], 1) > table(as.Date(unlist(lapply(1:nrow(DF), dateseq)), origin = "1970-01-01")) 2009-01-01 2009-01-02 2009-01-03 2009-01-04 2009-01-05 2009-01-06 2009-01-07 1 2 3 3 2 1 1 2009

[R] Counting session days

2009-02-09 Thread stefan . petersson
hi, I have some session data in a dataframe, where each session is recorded with a start and a stop date. Like this: session_start session_stop === 2009-01-03 2009-01-04 2009-01-01 2009-01-05 2009-01-02 2009-01-09 A session is at least one day long. Now I want