[GitHub] [arrow-cookbook] eitsupi commented on issue #83: [R] Recipe for random sampling

[GitBox <gi...@apache.org>]

eitsupi commented on issue #83:
URL: https://github.com/apache/arrow-cookbook/issues/83#issuecomment-1187635564

   I think this is a great use case for combining `arrow` and `duckdb`.
   There is no support for slice_* functions in `arrow` and `duckdb` does not yet have the ability to open a dataset.
   
   ```r
   library(arrow)
   library(dplyr)
   
   tf <- tempfile()
   dir.create(tf)
   
   nycflights13::flights |>
     group_by(month) |>
     write_dataset(tf)
   
   df <- open_dataset(tf, hive_style = TRUE) |>
     group_by(month) |>
     to_duckdb() |>
     slice_sample(n = 2) |>
     collect()
   ```


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