Hi everyone, I have a data frame with email addresses in the first column and in the second column a list of times (of different lengths) at which an email was sent from the user in the first column.
Here is an example of my data: Email Email_sent j...@doe.com "2013-09-26 15:59:55" "2013-09-27 09:48:29" "2013-09-27 10:00:02" "2013-09-27 10:12:54" j...@shoe.com "2013-09-26 09:50:28" "2013-09-26 14:41:24" "2013-09-26 14:51:36" "2013-09-26 17:50:10" "2013-09-27 13:34:02" "2013-09-27 14:41:10" "2013-09-27 15:37:36" ... I cannot find any way to calculate the frequencies between each email sent for each user: j...@doe.com 0.02 email / hour j...@shoe.com 0.15 email / hour ... Can anyone help me on this problem? The ultimate goal (which seems amibitious at this time) is to calculate, for each user, the frequencies between each mail per day, between the first email sent and the last email sent each day (to avoid taking nights into account), i.e.: 2013-09-26 2013-09-27 j...@doe.com 1.32 emails / hour 0.56 emails / hour j...@shoe.com 10.57 emails / hour 2.54 emails / hour ... At this time it seems pretty impossible, but I guess I will eventually find a way :-) Thanks a lot, Sartene Bel R learner ___________________________________________________________ Qu'y a-t-il ce soir à la télé ? D'un coup d'œil, visualisez le programme sur Voila.fr http://tv.voila.fr/programmes/chaines-tnt/ce-soir.html ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
