On Dec 21, 2005, at 11:02 AM, Jon Stearley wrote: > I need to calculate some metrics such as Mean Time Between Failure > (MTBF), etc (see http://www.cs.sandia.gov/~jrstear/ras for a more > complete list). I have observations like > > start end state > 1 2005-11-11 09:05:00 2005-11-11 12:20:00 Scheduled Downtime > 2 2005-11-12 13:42:00 2005-11-12 14:45:00 Unscheduled Downtime > > where each row describes the system state between start and end > times. Time between observations indicates a Production state. > The metrics of interest involve simple ratios of total time spent > in various states, number of transitions, etc. I'd like to plot > period MTBF values (eg monthly vertical bars), as well as a > cumulative MTBF (eg a line whose last value indicates MTBF for the > entire time range), etc. > > What is the best approach in R towards these results?
I have found that the zoo package fills most of my needs. Thanks. -jon ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
