Eloy Lafuente (stronk7)
29a541724f
This has been generated running the following Sniff, part of the Moodle's CodeSniffer standard: - PSR2.Methods.MethodDeclaration It just ensures all the function declarations have the correct order for: - abstract and final. - visibility (public, protected, private). - static. So, all the lines modified by this commit are function declarations and the only changes are in the positions of those keywords.
107 lines
2.9 KiB
PHP
107 lines
2.9 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Binary classifier target.
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*
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* @package core_analytics
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* @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace core_analytics\local\target;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Binary classifier target.
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*
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* @package core_analytics
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* @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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abstract class binary extends discrete {
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/**
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* is_linear
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*
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* @return bool
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*/
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public function is_linear() {
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return false;
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}
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/**
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* Returns the target discrete values.
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*
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* Only useful for targets using discrete values, must be overwriten if it is the case.
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*
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* @return array
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*/
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final public static function get_classes() {
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return array(0, 1);
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}
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/**
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* Returns the predicted classes that will be ignored.
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*
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* @return array
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*/
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public function ignored_predicted_classes() {
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// Zero-value class is usually ignored in binary classifiers.
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return array(0);
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}
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/**
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* Is the calculated value a positive outcome of this target?
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*
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* @param string $value
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* @param string $ignoredsubtype
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* @return int
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*/
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public function get_calculation_outcome($value, $ignoredsubtype = false) {
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if (!self::is_a_class($value)) {
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throw new \moodle_exception('errorpredictionformat', 'analytics');
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}
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if (in_array($value, $this->ignored_predicted_classes(), false)) {
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// Just in case, if it is ignored the prediction should not even be recorded but if it would, it is ignored now,
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// which should mean that is it nothing serious.
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return self::OUTCOME_VERY_POSITIVE;
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}
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// By default binaries are danger when prediction = 1.
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if ($value) {
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return self::OUTCOME_VERY_NEGATIVE;
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}
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return self::OUTCOME_VERY_POSITIVE;
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}
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/**
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* classes_description
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*
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* @return string[]
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*/
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protected static function classes_description() {
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return array(
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get_string('yes'),
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get_string('no')
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);
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}
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}
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