row combining 2972 files
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 <ycding at 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)
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