[R] System Reliability Metrics
jrstear at sandia.gov
Fri Dec 23 20:32:28 CET 2005
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.
More information about the R-help