.. _fwflag_test_folds:
=============
--test_folds
=============
Switch
======

--test_folds FOLD [FOLD ...]

Description
===========

Restricts cross-validated testing to only these fold values, when using :doc:`fwflag_fold_column` for pre-assigned folds.

Argument and Default Value
==========================

One or more integers. Default: ``None`` (test all folds found in :doc:`fwflag_fold_column`).

Details
=======

Passed as ``testFolds=args.test_folds`` into the prediction/classification cross-validation call. Only meaningful together with :doc:`fwflag_fold_column` — with DLATK's default random folding there are no stable fold ids to select by.

Other Switches
==============

Required Switches:

* :doc:`fwflag_fold_column`
* One of :doc:`fwflag_combo_test_regression`, :doc:`fwflag_combo_test_classifiers`, or another cross-validated prediction switch

Example Commands
================

.. code-block:: bash

	dlatkInterface.py -d dla_tutorial -t msgs -c user_id -f 'feat$1gram$msgs$user_id$16to16' \
	--outcome_table blog_outcomes --outcomes age --fold_column predefined_fold --test_folds 1 2 3 --combo_test_regression