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#### 3.7.5 Feather

The Feather file format is a column-oriented binary disk-based format based on Apache Arrow and supported by (at least) Python, R and Julia. Some description of it is available at https://github.com/wesm/feather and https://blog.rstudio.com/2016/03/29/feather/. It can be used for large datasets, but it does not support array-valued columns. It can be a useful format to use for exchanging data with R, for which FITS I/O is reported to be slow.

This writer is somewhat experimental; please report problems if you encounter them.

If no output format is explicitly chosen, writing to a filename with the extension "`.fea`" or "`.feather`" (case insensitive) will select `feather` format for output.

The handler class for this format is `FeatherTableWriter`.

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STIL - Starlink Tables Infrastructure Library
Starlink User Note252
STIL web page: http://www.starlink.ac.uk/stil/
Author email: m.b.taylor@bristol.ac.uk