File: Add-an-example.patch

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From: Christian Kastner <ckk@kvr.at>
Date: Tue, 29 Sep 2015 13:49:26 +0200
Subject: Add an example

Add one of Vincenzo Di Massa's (the original author of the bindings) code
examples.

Taken from the original FANN source.

Last-Update: 2015-09-29
---
 examples/simple_train.py | 22 ++++++++++++++++++++++
 examples/xor.data        |  9 +++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 examples/simple_train.py
 create mode 100644 examples/xor.data

diff --git a/examples/simple_train.py b/examples/simple_train.py
new file mode 100644
index 0000000..cc197d7
--- /dev/null
+++ b/examples/simple_train.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+from fann2 import libfann
+
+connection_rate = 1
+learning_rate = 0.7
+num_input = 2
+num_neurons_hidden = 4
+num_output = 1
+
+desired_error = 0.0001
+max_iterations = 100000
+iterations_between_reports = 1000
+
+ann = libfann.neural_net()
+ann.create_sparse_array(connection_rate, (num_input, num_neurons_hidden, num_output))
+ann.set_learning_rate(learning_rate)
+ann.set_activation_function_output(libfann.SIGMOID_SYMMETRIC_STEPWISE)
+
+ann.train_on_file("xor.data", max_iterations, iterations_between_reports, desired_error)
+
+ann.save("xor_float.net")
+
diff --git a/examples/xor.data b/examples/xor.data
new file mode 100644
index 0000000..e831fc6
--- /dev/null
+++ b/examples/xor.data
@@ -0,0 +1,9 @@
+4 2 1
+-1 -1
+-1
+-1 1
+1
+1 -1
+1
+1 1
+-1