Try sapply( Lst, function(m) m[1,1] )
Also note that to subset a list, you just need Lst[ 1:10 ] and not Lst[[ 1:10 ]] (note the double square brackets). Regards, Adai Forest Floor 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.