FAQ - Revision history

Thwien at 21:22, 12 December 2012

2012-12-12T21:22:48Z

← Older revision		Revision as of 21:22, 12 December 2012
Line 84:		Line 84:

	$objNetwork->printNetwork();		$objNetwork->printNetwork();
			</source>

			== How to adjust the network's tolerance down? ==

			The default error tolerance of the neural network is set to 0.02 if running a linear network. To increase tolerance use the following code.

			<source lang="php">

			$objNetwork->setOutputErrorTolerance(0.1);

	</source>		</source>

Thwien: /* What are the dat-files? */

2011-06-01T12:24:35Z

What are the dat-files?

← Older revision		Revision as of 12:24, 1 June 2011
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	== What are the dat-files? ==		== What are the dat-files? ==

	A dat-file is an auto-generated file. Its contents is a serialized structure of the saved object. It will be generated while training the neural network by using '''~~ANN_InputValue~~::saveToFile()''' or '''~~ANN_Network~~::saveToFile()''' and can be reloaded into the running network by '''~~ANN_InputValue~~::loadFromFile()''' or '''~~ANN_InputValue~~::loadFromFile()'''.		A dat-file is an auto-generated file. Its contents is a serialized structure of the saved object. It will be generated while training the neural network by using '''\ANN\InputValue::saveToFile()''' or '''\ANN\Network::saveToFile()''' and can be reloaded into the running network by '''\ANN\InputValue::loadFromFile()''' or '''\ANN\InputValue::loadFromFile()'''.

	The dat-files are not included to the example code downloads because they are auto-generated.		The dat-files are not included to the example code downloads because they are auto-generated.
Line 37:		Line 37:
	<source lang="php">		<source lang="php">
	require_once 'ANN/Loader.php';		require_once 'ANN/Loader.php';

			use ANN\Network;
			use ANN\Values;

	try		try
	{		{
	$objNetwork = ~~ANN_Network~~::loadFromFile('dats/xor.dat');		$objNetwork = Network::loadFromFile('dats/xor.dat');
	}		}
	catch(Exception $e)		catch(Exception $e)
Line 46:		Line 49:
	print 'Creating a new one...';		print 'Creating a new one...';

	$objNetwork = new ~~ANN_Network~~;		$objNetwork = new Network;

	$objValues = new ~~ANN_Values~~;		$objValues = new Values;

	$objValues->train()		$objValues->train()
Line 63:		Line 66:
	try		try
	{		{
	$objValues = ~~ANN_Values~~::loadFromFile('dats/values_xor.dat');		$objValues = Values::loadFromFile('dats/values_xor.dat');
	}		}
	catch(Exception $e)		catch(Exception $e)

Thwien: /* What are the dat-files? */

2009-12-22T11:33:07Z

What are the dat-files?

← Older revision		Revision as of 11:33, 22 December 2009
Line 36:		Line 36:
	Use this subdirectory in your PHP scripts:		Use this subdirectory in your PHP scripts:
	<source lang="php">		<source lang="php">
	require_once 'ANN/~~ANN_Loader~~.php';		require_once 'ANN/Loader.php';

	try		try

Thwien: New page: == What are the dat-files? == A dat-file is an auto-generated file. Its contents is a serialized structure of the saved object. It will be generated while training the neural network by u...

2009-10-28T07:52:59Z

New page: == What are the dat-files? == A dat-file is an auto-generated file. Its contents is a serialized structure of the saved object. It will be generated while training the neural network by u...

New page

== What are the dat-files? ==

A dat-file is an auto-generated file. Its contents is a serialized structure of the saved object. It will be generated while training the neural network by using '''ANN_InputValue::saveToFile()''' or '''ANN_Network::saveToFile()''' and can be reloaded into the running network by '''ANN_InputValue::loadFromFile()''' or '''ANN_InputValue::loadFromFile()'''.

The dat-files are not included to the example code downloads because they are auto-generated.

To save the dat-files the directory you are saving the files should have write permission to the PHP process running.

For example if your PHP script is running as a PHP module by Apache and the Apache is running as user ''www-data'', so you can use the following code to set the permissions.

Change to the directory where your own ANN script is stored.

>cd <PROJECTDIR-OF-YOUR-ANN>

Create a subdirectory for all your dat-files.

>mkdir dats

Change the group owner of this subdirectory to ''www-data''.

>chgrp www-data dats

Change the UNIX permissions to the group for write access to this subdirectory.

>chmod g+w dats

Due to security remove all ''others'' permissions in this case.

>chmod o-rwx dats

List your permissions.

>ls -la dats
drwxrwx--- 7 user www-data 4.0K 2009-10-28 08:52 dats

Use this subdirectory in your PHP scripts:
<source lang="php">
require_once 'ANN/ANN_Loader.php';

try
{
$objNetwork = ANN_Network::loadFromFile('dats/xor.dat');
}
catch(Exception $e)
{
print 'Creating a new one...';

$objNetwork = new ANN_Network;

$objValues = new ANN_Values;

$objValues->train()
->input(0,0)->output(0)
->input(0,1)->output(1)
->input(1,0)->output(1)
->input(1,1)->output(0);

$objValues->saveToFile('dats/values_xor.dat');

unset($objValues);
}

try
{
$objValues = ANN_Values::loadFromFile('dats/values_xor.dat');
}
catch(Exception $e)
{
die('Loading of values failed');
}

$objNetwork->setValues($objValues); // to be called as of version 2.0.6

$boolTrained = $objNetwork->train();

print ($boolTrained)
? 'Network trained'
: 'Network not trained completely. Please re-run the script';

$objNetwork->saveToFile('dats/xor.dat');

$objNetwork->printNetwork();
</source>