David Winsemius wrote: >> No, Reduce reduces an entire vector to a single value by >> repeatedly >> combining adjacent elements. I'm looking to convert a vector to >> another vector where each element is some arbitrary aggregating >> function applied to the first n elements of the vector. > > Yes. You need to look again: > > accumulate=FALSE by default, but is subject to change.-
Ah, sorry. Yes, you're right. However, this still doesn't satisfy my needs, because since Reduce successively combines one element at a time, it doesn't work for functions that don't self-compose transitively. For instance: > Reduce(mean, c(1,2,3,4), accumulate=T) [1] 1 1 1 1 but I want > cumapply(mean, c(1,2,3,4)) [1] 1 1.5 2 2.5 Is there anything this general? Thanks, -- --OKB (not okblacke) Brendan Barnwell "Do not follow where the path may lead. Go, instead, where there is no path, and leave a trail." --author unknown ______________________________________________ R-help@r-project.org 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.