jorisvandenbossche commented on a change in pull request #91:
URL: https://github.com/apache/arrow-cookbook/pull/91#discussion_r738361253
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File path: r/content/reading_and_writing_data.Rmd
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@@ -359,3 +358,123 @@ unlink("my_table.parquet")
unlink("dist_time.parquet")
unlink("airquality_partitioned", recursive = TRUE)
```
+
+## Write compressed data
+
+You want to save a file, compressed with a specified compression algorithm.
+
+### Solution
+
+```{r, parquet_gzip}
+# Create a temporary directory
+td <- tempfile()
+dir.create(td)
+
+# Write data compressed with the gzip algorithm
+write_parquet(iris, file.path(td, "iris.parquet"), compression = "gzip")
Review comment:
I am going to give the same comment as on the PR for the Python version
.. but, `write_parquet` already compresses by default. So I would personally at
least mention that more prominently (instead of the "see also" quite a bit
below).
In addition, this is showing the code snippet `write_parquet(...,
compression= "gzip")` which people might start copy pasting if they want
compression. I personally don't know much about the different compression
variants, so I don't know if this is actually a good choice to show.
(in general, we probably want people to just do `write_parquet(table, file)`
without an actual compression specified, except if you know what you are doing
and have a reason to choose a specific compression)
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