> -----Original Message----- > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Luigi > Marongiu > if I have a sample set of the following numbers x1=0.09, x2=0.94, x3=0.48, > x4=0.74, x5=0.04 I can calculate the variance easily. Not without concatenating them into a vector, you can't. You need them in a vector, as in var( c(x1, x2, x3, x4, x5) )
> But if each x is actually a subset of multiple values, what would be the > formula > to calculate the variance? and it is possible to implement such mathematical > function in R? This is what R wants anyway, so the function you are looking for is var() > For instance if I have the following: x1=(0.77, 0.22, 0.44), x2=(0.26, 0.89, > 0.58), > x3=(0.20, 0.25, 0.91), x4=(0.06, 0.13, 0.26) and x5=(0.65, 0.16, 0.72) how > can i > calculate the variance for each x? var(x1) var(x2) .... or, if you want to be a bit more slick about it and do it in one line lapply(list( x1, x2, x3, ...), var ) (or sapply() if you want a vector result) ******************************************************************* This email and any attachments are confidential. Any use...{{dropped:8}} ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.