This is an indication of the amount of CPU resources that you are using. Elapsed time is just the number of seconds that the R process (e.g., RGUI) has been running. "user" time is the amount of CPU that any commands/scripts have used that you are running; this is the one that you are typically interested in. 'system' time is the amount of CPU that the operating system has used to run your script; in most cases this should be a lot less than 'user'. The reason is might be high is if you are doing a lot of I/O, or running short of physical memory and having to 'page' parts of it to disk. For a CPU intensive application, I like user:system to be at least 10:1.
"sprinkle" proc.time() throughout your code (actually print(proc.time() so you get output when running a script or in a function). You will have to determine what the characteristics are for your script/application. On Mon, Nov 28, 2011 at 12:50 AM, Jorge I Velez <[email protected]> wrote: > Hi Vikram, > > Check ?system.time and ?proc.time. > > HTH, > Jorge.- > > > On Mon, Nov 28, 2011 at 12:41 AM, Vikram Bahure <> wrote: > >> Dear R users. >> >> I wanted to know, how do we read the output of system.time. It would be >> helpful if you could let me know what are user system and elapsed. >> >> Regards >> Vikram >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> [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 >> and provide commented, minimal, self-contained, reproducible code. >> > > [[alternative HTML version deleted]] > > ______________________________________________ > [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 > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
