Hi Jim, Thanks . Some how i have messed up mu lapply function. Worked upon restart. Tanvir Ahamed Göteborg, Sweden | [email protected]
----- Original Message ----- From: Jim Lemon <[email protected]> To: Mohammad Tanvir Ahamed <[email protected]> Cc: R-help Mailing List <[email protected]> Sent: Tuesday, 8 March 2016, 3:00 Subject: Re: [R] Extract every 2 element for a list which are not equal in length Hi Tanvir, I think what you want is: lapply(e,"[",1) lapply(e,"[",2) Jim On Tue, Mar 8, 2016 at 11:47 AM, Mohammad Tanvir Ahamed via R-help <[email protected]> wrote: > Hi, > > a <- c(1:5)b <- c(1:3) > c <- 1 > d <- 5 > e <- list(a,b,c,d) > > # To extract every 1st element > lapply(e,"[[",1) > > ## Out-put > [[1]] > [1] 1 > > [[2]] > [1] 1 > > [[3]] > [1] 1 > > [[4]] > [1] 5 > > #To extract every 2nd element (Need help in this case) > lapply(e,"[[",2) > > ## Expected outcome > [[1]] > [1] 2 > > [[2]] > [1] 2 > > [[3]] > [1] NA > > [[4]] > [1] NA > > > > Any help will be appreciated . Thanks > > > Tanvir Ahamed > Göteborg, Sweden | [email protected] > > ______________________________________________ > [email protected] 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. ______________________________________________ [email protected] 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.
