0.4.0 :small:`23 December, 2017`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

- read/write `.loom <https://loompy.org>`_ files
- scalability beyond dataset sizes that fit into memory: see this `blog post`_
- :class:`~anndata.AnnData` has a :class:`~anndata.AnnData.raw` attribute, which simplifies storing the data matrix when you consider it *raw*: see the `clustering tutorial`_

.. _blog post: http://falexwolf.de/blog/171223_AnnData_indexing_views_HDF5-backing/
.. _clustering tutorial: https://github.com/theislab/scanpy_usage/tree/master/170505_seurat
