Current Path : C:/xampp/htdocs/moodle/analytics/classes/local/indicator/ |
Current File : C:/xampp/htdocs/moodle/analytics/classes/local/indicator/binary.php |
<?php // This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. /** * Abstract binary indicator. * * @package core_analytics * @copyright 2017 David Monllao {@link http://www.davidmonllao.com} * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ namespace core_analytics\local\indicator; defined('MOODLE_INTERNAL') || die(); /** * Abstract binary indicator. * * @package core_analytics * @copyright 2017 David Monllao {@link http://www.davidmonllao.com} * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ abstract class binary extends discrete { /** * get_classes * * @return array */ public static final function get_classes() { return [-1, 1]; } /** * It should always be displayed. * * Binary values have no subtypes by default, please overwrite if * your indicator is adding extra features. * * @param float $value * @param string $subtype * @return bool */ public function should_be_displayed($value, $subtype) { if ($subtype != false) { return false; } return true; } /** * get_display_value * * @param float $value * @param string $subtype * @return string */ public function get_display_value($value, $subtype = false) { // No subtypes for binary values by default. if ($value == -1) { return get_string('no'); } else if ($value == 1) { return get_string('yes'); } else { throw new \moodle_exception('errorpredictionformat', 'analytics'); } } /** * get_calculation_outcome * * @param float $value * @param string $subtype * @return int */ public function get_calculation_outcome($value, $subtype = false) { // No subtypes for binary values by default. if ($value == -1) { return self::OUTCOME_NEGATIVE; } else if ($value == 1) { return self::OUTCOME_OK; } else { throw new \moodle_exception('errorpredictionformat', 'analytics'); } } /** * get_feature_headers * * @return array */ public static function get_feature_headers() { // Just 1 single feature obtained from the calculated value. return array('\\' . get_called_class()); } /** * to_features * * @param array $calculatedvalues * @return array */ protected function to_features($calculatedvalues) { // Indicators with binary values have only 1 feature for indicator, here we do nothing else // than converting each sample scalar value to an array of scalars with 1 element. array_walk($calculatedvalues, function(&$calculatedvalue) { // Just return it as an array. $calculatedvalue = array($calculatedvalue); }); return $calculatedvalues; } }