Re: [R] scaling to multiple data files

2011-01-11 Thread Jason Edgecombe
That's correct, those users have been logged in or had processes running on this machine for four days. The machines in question are time-sharing Linux servers for college students and professors to use. multi-day jobs are common. The "last" command does what you suggest, but it doesn't captur

Re: [R] scaling to multiple data files

2011-01-11 Thread jim holtman
I am not sure exactly what your data represents. For example, from looking at the data it appears that user1 and user2 have been logged on for about 4 days; is that what the data is saying? If you are keeping track of users, why not write out a file that has the start/end time for each user's ses

[R] scaling to multiple data files

2011-01-11 Thread Jason Edgecombe
Hello, I have logging information for multiple machines, which I am trying to summarize and graph. So far, I process each host individually, but I would like to summarize the user count across multiple hosts. I want to answer the question "how many unique users logged in on a certain day acro