Terry, I don't know if it is much cleaner or not, but you can use:
sapply(fits, `[[`, 'iter') This calls the `[[` function (to extract list elements) on each element of the top list, with the extra argument of `iter` to say which element. On Tue, Dec 27, 2022 at 10:16 AM Therneau, Terry M., Ph.D. via R-help <r-help@r-project.org> wrote: > > I not uncommonly have the following paradym > fits <- lapply(argument, function) > > resulting in a list of function results. Often, the outer call is to > mclapply, and the > function encodes some long calculation, e.g. multiple chains in an MCMC. > Assume for illustration that each function returns a list with elements > beta, loglik, iter. > > Then sapply(fits, function(x) x$iter) > will give me a vector, with the number of iterations used by each instance. > > I've often been suspicious that there is some simple shorthand for the "grab > all the > elements named iter" that skips the explicit x$iter function. Am I indeed > overlooking > something? I don't expect a speed increase, just cleaner code. > > Terry T. > > -- > Terry M Therneau, PhD > Department of Quantitative Health Sciences > Mayo Clinic > thern...@mayo.edu > > "TERR-ree THUR-noh" > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
