[R] row combining 2972 files

[Bert Gunter]

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 using 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
>
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