how to get an element with same name in a list to avoid for loop in R -

i have simple question. assuming have list obj of length 500

obj[[1]], obj[[2]], ....obj[[500]], #for each obj[[i]], has element  obj[[i]]$logl,

my question how extract logl of each obj avoid loop this?

logl = rep(na, length(obj)) for(i in 1: length(obj)){    logl[i] = obj[[i]]$logl }

is there way sapply or advanced packages plyr? open solutions long faster loop since need within mcmc , length of list can 3000 prefer fast method.

thanks in advance!

you can use apply group of functions purpose. here tutorial http://www.r-bloggers.com/using-apply-sapply-lapply-in-r/

sapply(obj, function(x) x$logl )

UV code