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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<chapter xml:id="fann.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
&reftitle.examples;
<section xml:id="fann.examples-1">
<title>XOR training</title>
<para>
This example shows how to train data for XOR function
<example>
<title>xor.data file</title>
<programlisting role="txt">
<![CDATA[
4 2 1
-1 -1
-1
-1 1
1
1 -1
1
1 1
-1
]]>
</programlisting>
</example>
<example>
<title>Simple train</title>
<programlisting role="php">
<![CDATA[
<?php
$num_input = 2;
$num_output = 1;
$num_layers = 3;
$num_neurons_hidden = 3;
$desired_error = 0.001;
$max_epochs = 500000;
$epochs_between_reports = 1000;
$ann = fann_create_standard($num_layers, $num_input, $num_neurons_hidden, $num_output);
if ($ann) {
fann_set_activation_function_hidden($ann, FANN_SIGMOID_SYMMETRIC);
fann_set_activation_function_output($ann, FANN_SIGMOID_SYMMETRIC);
$filename = dirname(__FILE__) . "/xor.data";
if (fann_train_on_file($ann, $filename, $max_epochs, $epochs_between_reports, $desired_error))
fann_save($ann, dirname(__FILE__) . "/xor_float.net");
fann_destroy($ann);
}
?>
]]>
</programlisting>
</example>
</para>
<para>
This example shows how to read and run data for XOR function
<example>
<title>Simple test</title>
<programlisting role="php">
<![CDATA[
<?php
$train_file = (dirname(__FILE__) . "/xor_float.net");
if (!is_file($train_file))
die("The file xor_float.net has not been created! Please run simple_train.php to generate it");
$ann = fann_create_from_file($train_file);
if (!$ann)
die("ANN could not be created");
$input = array(-1, 1);
$calc_out = fann_run($ann, $input);
printf("xor test (%f,%f) -> %f\n", $input[0], $input[1], $calc_out[0]);
fann_destroy($ann);
?>
]]>
</programlisting>
</example>
</para>
</section>
</chapter>
|
