Rework ARAD examples.

examples/modeling/arad.py

@@ -0,0 +1,39 @@
+# Copyright 2021 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
+# Under the terms of Contract DE-NA0003525 with NTESS,
+# the U.S. Government retains certain rights in this software.
+"""This example demonstrates how to use the PyRIID implementations of ARAD.
+"""
+import sys
+import tensorflow as tf
+from riid.models.neural_nets.arad import ARADv1TF, ARADv2TF
+
+if len(sys.argv) == 2:
+    import matplotlib
+    matplotlib.use("Agg")
+
+
+def show_summaries(model):
+    model_type = type(model).__name__
+    print(model_type)
+
+    model.encoder.summary()
+    model.decoder.summary()
+    model.autoencoder.summary()
+
+    # The following requires `graphviz` (system software) and `pydot` (Python package)
+    try:
+        tf.keras.utils.plot_model(
+            model.autoencoder,
+            f"{model_type}.png",
+            show_shapes=True,
+            rankdir="LR",
+            expand_nested=True,
+        )
+    except Exception:
+        pass
+
+
+v1_model = ARADv1TF()
+show_summaries(v1_model)
+v2_model = ARADv2TF()
+show_summaries(v2_model)