Extracting data from list of lists of dataframes
?reproducible example (see posting guide below) or https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example However, I would suggest that you spend some time with an R tutorial or two rather than flailing about with such queries here. R has basic tools -- indexing by logical expressions, for example -- for such tasks that you seem completely ignorant about. You would do better to invest the time to learn them. Just my opinion of course. Feel free to ignore. 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, May 27, 2020 at 6:38 PM H <agents at meddatainc.com> wrote:
I am a newcomer to R and have been struggling with the following problem:
I have a list1(1:N) containing a list2(1:2) each containing dataframes
with the same column names but different number of rows. Both lists are
named and the rows and the columns in the dataframe are named. I then would
like to use select() and filter() on the dataframes to select data.
I would like to: (1) select among the top-level lists, (2) select among
the second-level lists and (3) finally use select() and filter() on the
dataframe data.
My attempt so far is:
list1[grepl("myfirstselection", names(list1)][grepl("mysecondselection",
names(list1[[]]))]
Needless to say it does not work... And, I have not even gotten to the
dataframes yet... ;-)
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