Hi, Kim- For starters you might have a look at ?by ?tapply ?aggregate
Ken On 07/22/11, kimberly sels wrote: > Hi, > > I need to calculate the average length of a trait per individual. I am not > used to working with R so I could use some help. > The table goes like this: > > ind trait > 1 3.6 > 1 3.8 > 1 3.9 > 1 3.6 > 2 5.5 > 2 5.2 > 3 4.8 > 3 4.5 > > and so on... > > If I type mean(trait) it will give me the average of all the individuals and > I need a list of averages per individual. > Can you help me please? > > Kim > > [[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.
______________________________________________ [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.
