mirror of
https://github.com/sigmasternchen/php-doc-en
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ea7caabb16
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@331220 c90b9560-bf6c-de11-be94-00142212c4b1
87 lines
2.9 KiB
XML
87 lines
2.9 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.fann-get-cascade-candidate-change-fraction" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>fann_get_cascade_candidate_change_fraction</refname>
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<refpurpose>Returns the cascade candidate change fraction</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>float</type><methodname>fann_get_cascade_candidate_change_fraction</methodname>
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<methodparam><type>resource</type><parameter>ann</parameter></methodparam>
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</methodsynopsis>
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<para>
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The cascade candidate change fraction is a number between 0 and 1 determining how large a fraction the <function>fann_get_MSE</function>
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value should change within <function>fann_get_cascade_candidate_stagnation_epochs</function> during training of the candidate neurons,
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in order for the training not to stagnate. If the training stagnates, the training of the candidate neurons will be ended
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and the best candidate will be selected.
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</para>
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<para>
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It means that if the MSE does not change by a fraction of <function>fann_get_cascade_candidate_change_fraction</function> during
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a period of <function>fann_get_cascade_candidate_stagnation_epochs</function>, the training of the candidate neurons is stopped
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because the training has stagnated.
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</para>
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<para>
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If the cascade candidate change fraction is low, the candidate neurons will be trained more and if the fraction is high they will be trained less.
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</para>
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<para>
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The default cascade candidate change fraction is 0.01, which is equalent to a 1% change in MSE.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>ann</parameter></term>
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<listitem>
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&fann.ann.description;
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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The cascade candidate change fraction, or &false; on error.
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>fann_set_cascade_candidate_change_fraction</function></member>
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<member><function>fann_get_MSE</function></member>
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<member><function>fann_get_cascade_candidate_stagnation_epochs</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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