How to extract a dataframe which is within a list in r, using a condition?

Question

I have a list which has dataframes of various dimensions. I want to extract those dataframes who rows greater than 30 I tried :

DR<-sapply(list, function(x)         


        

Answer 1

Assuming your list is called list_df, we can use Filter

Filter(function(x) nrow(x) == 30, list_df)

Or sapply

list_df[sapply(list_df, nrow) == 30]

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We can also use purrr::keep

purrr::keep(list_df, ~nrow(.) == 30)