add AnnotationSeries example to docs (#1989)

* add AnnotationSeries example to docs

* update CHANGELOG

CHANGELOG.md

@@ -7,6 +7,7 @@
 
 ### Documentation and tutorial enhancements
 - Added documentation example for `SpikeEventSeries`. @stephprince [#1983](https://github.com/NeurodataWithoutBorders/pynwb/pull/1983)
+- Added documentation example for `AnnotationSeries`. @stephprince [#1989](https://github.com/NeurodataWithoutBorders/pynwb/pull/1989)
 
 ### Performance
 - Cache global type map to speed import 3X. @sneakers-the-rat [#1931](https://github.com/NeurodataWithoutBorders/pynwb/pull/1931)

docs/gallery/general/plot_file.py

@@ -131,6 +131,7 @@
 from pynwb import NWBHDF5IO, NWBFile, TimeSeries
 from pynwb.behavior import Position, SpatialSeries
 from pynwb.file import Subject
+from pynwb.misc import AnnotationSeries
 
 ####################
 # .. _basics_nwbfile:
@@ -285,6 +286,27 @@
 # or using the method :py:meth:`.NWBFile.get_acquisition`:
 nwbfile.get_acquisition("test_timeseries")
 
+####################
+# Other Types of Time Series
+# ^^^^^^^^^^^^^^^^^^^^^^^^^^
+#
+# As mentioned previously, there are many subtypes of :py:class:`~pynwb.base.TimeSeries` that are used to store
+# different kinds of data. One example is :py:class:`~pynwb.misc.AnnotationSeries`, a subclass of 
+# :py:class:`~pynwb.base.TimeSeries` that stores text-based records about the experiment. Similarly to our
+# :py:class:`~pynwb.base.TimeSeries` example above, we can create an :py:class:`~pynwb.misc.AnnotationSeries` 
+# object with text information about a stimulus and add it to the stimulus group in 
+# the :py:class:`~pynwb.file.NWBFile`. 
+
+annotations = AnnotationSeries(name='airpuffs',
+                               data=['Left Airpuff', 'Right Airpuff', 'Right Airpuff'],
+                               description='Airpuff events delivered to the animal',
+                               timestamps=[1.0, 3.0, 8.0])
+
+nwbfile.add_stimulus(annotations)
+
+####################
+# This approach of creating a :py:class:`~pynwb.base.TimeSeries` object and adding it to the appropriate 
+# :py:class:`~pynwb.file.NWBFile` group can be used for all subtypes of :py:class:`~pynwb.base.TimeSeries` data.
 
 ####################
 # .. _basic_spatialseries: