All,
Please excuse what may be a slightly off-topic question. I'm having trouble
extracting elements from a list of lists.
Here is an example:
# Make list of lists:
seq <- 1:100
l <- vector("list", 100)
for (i in seq) {l[[i]] <- list(species=seq[i], name=as.character(seq[i])) }
# Extract second elements:
l$name # NULL
l[seq]$name # also NULL
s <- unlist(lapply(seq, function(seq) l[[seq]]$name))
The lapply() call works fine, but it seems quite inefficient or indirect. Can
anyone suggest a more intuitive extraction?
Thanks,
Phil
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Phil Novack-Gottshall
Assistant Professor
Department of Biological Sciences
Benedictine University
5700 College Road
Lisle, IL 60532
pnovack-gottsh...@ben.edu<mailto:pnovack-gottsh...@ben.edu>
Phone: 630-829-6514
Fax: 630-829-6547
Office: 332 Birck Hall
Lab: 107 Birck Hall
http://www1.ben.edu/faculty/pnovack-gottshall
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