Untested in the absence of example data, but I think combined <- do.call(rbind, lapply(ls2972, function(x)get(x)[[2]]))
should do it. Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Wed, Mar 18, 2020 at 12:16 PM Yuan Chun Ding <ycd...@coh.org> wrote: > Hi R users, > > I generated 2972 list files in R, each list includes four data frame files > , file names for those list file are VNTR13576, VNTR14689, etc. the second > data frame in each list has the same 11 column names, but different number > of rows. > > I can combine two dataframes by > list2972 <-ls(pat="VNTR.*.") > test <-rbind(get(list2972[16])[[2]],get(list2972[166])[[2]] ) > > I tried to combine all 2972 data frames from those 2972 list files using > do.call or lapply function, but not successful. > > Can you help me? > > Thank you very much! > > Ding > > ---------------------------------------------------------------------- > ------------------------------------------------------------ > -SECURITY/CONFIDENTIALITY WARNING- > > This message and any attachments are intended solely for the individual or > entity to which they are addressed. This communication may contain > information that is privileged, confidential, or exempt from disclosure > under applicable law (e.g., personal health information, research data, > financial information). Because this e-mail has been sent without > encryption, individuals other than the intended recipient may be able to > view the information, forward it to others or tamper with the information > without the knowledge or consent of the sender. If you are not the intended > recipient, or the employee or person responsible for delivering the message > to the intended recipient, any dissemination, distribution or copying of > the communication is strictly prohibited. If you received the communication > in error, please notify the sender immediately by replying to this message > and deleting the message and any accompanying files from your system. If, > due to the security risks, you do not wish to receive further > communications via e-mail, please reply to this message and inform the > sender that you do not wish to receive further e-mail from the sender. > (LCP301) > > ______________________________________________ > 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. > [[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.
