Use lapply or sapply: > L <- list(a = 1:4, b = 11:15) > lapply(L, "[[", 1) $a [1] 1
$b [1] 11 > sapply(L, "[[", 1) a b 1 11 Also please see last line on every r-help message regarding providing reproducible code. Lst was not defined in your post. On 7/14/07, Forest Floor <[EMAIL PROTECTED]> wrote: > Hi, > > I would love an easy way to extract elements from a list. > > For example, if I want the first element from each of 10 arrays stored > in a list, > > Lst[[1:10]][1,1] seems like a logical approach, but gives this error: > "Error: recursive indexing failed at level 3" > > The following workaround is functional but can get annoying/confusing. > > first.element=vector() > for (i in 1:10){ first.element=c(first.element, Lst[[i]][1,1]) } > > Is there a better way to do this? Thanks for any help! > > Jeff > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > ______________________________________________ R-help@stat.math.ethz.ch 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.