vibhatha commented on code in PR #13687:
URL: https://github.com/apache/arrow/pull/13687#discussion_r927597039
##########
docs/source/python/compute.rst:
##########
@@ -370,3 +370,80 @@ our ``even_filter`` with a ``pc.field("nums") > 5`` filter:
:class:`.Dataset` currently can be filtered using :meth:`.Dataset.to_table`
method
passing a ``filter`` argument. See :ref:`py-filter-dataset` in Dataset
documentation.
+
+
+User-Defined Functions
+======================
+
+.. warning::
+ User-defined functions only supports scalar functions and the current
version is experimental.
+
+To use a user-defined-function (UDF), either the experimental `dataset` API
options can be used or the
+function can be directly called using :func:`pyarrow.compute.call_function`.
+
+To register a UDF, a function name, function docs and input types and output
type needs to be defined.
+
+.. code-block:: python
+
+ import pyarrow.compute as pc
+ function_name = "regression"
Review Comment:
Ah I think I started thinking about writing a regression and ended up with a
simple equation. Let's rename it to something like `cost_update`?
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