Hi all, Here's what I have. I have a list of log-in times for users and how long their sessions were.
user, login_time, session_min alice, 2010/01/01 10:00, 145 bob, 2010/01/01 11:00, 30 What I want to do is create a bar chart showing, in 1/2 hour segments, the number of users logged in at the same time. For example: 10:00 1 10:30 1 11:00 2 11:30 1 The only way I can do this now is to send the data through a Perl script to generate raw data like: alice, 2010/01/01, 10:00 alice, 2010/01/01, 10:30 alice, 2010/01/01, 11:00 ... bob, 2010/01/01, 11:00 I've looked through the man pages for a couple hours now, and I can't find a better of way of doing this directly in R. Any help or pointers? Thanks in advance. ______________________________________________ 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.
