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efrain |
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<?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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* This file is responsible for producing the graph for survey reports
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*
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* @package mod_survey
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* @copyright 2021 Sujith Haridasan <sujith@moodle.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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require_once("../../config.php");
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require_once("$CFG->libdir/graphlib.php");
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require_once("lib.php");
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$id = required_param('id', PARAM_INT); // Course Module ID.
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$type = required_param('type', PARAM_FILE); // Graph Type.
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$group = optional_param('group', 0, PARAM_INT); // Group ID.
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$sid = optional_param('sid', false, PARAM_INT); // Student ID.
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$qid = optional_param('qid', 0, PARAM_INT); // Group ID.
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$url = new moodle_url('/mod/survey/graph.php', array('id' => $id, 'type' => $type));
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if ($group !== 0) {
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$url->param('group', $group);
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}
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if ($sid !== false) {
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$url->param('sid', $sid);
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}
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if ($qid !== 0) {
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$url->param('qid', $qid);
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}
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$PAGE->set_url($url);
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if (!$cm = get_coursemodule_from_id('survey', $id)) {
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throw new \moodle_exception('invalidcoursemodule');
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}
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if (!$course = $DB->get_record("course", array("id" => $cm->course))) {
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throw new \moodle_exception('coursemisconf');
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}
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if ($sid) {
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if (!$user = $DB->get_record("user", array("id" => $sid))) {
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throw new \moodle_exception('invaliduserid');
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}
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}
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require_login($course, false, $cm);
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$groupmode = groups_get_activity_groupmode($cm); // Groups are being used.
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$context = context_module::instance($cm->id);
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if (!has_capability('mod/survey:readresponses', $context)) {
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if ($type != "student.png" or $sid != $USER->id) {
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throw new \moodle_exception('nopermissiontoshow');
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} else if ($groupmode and !groups_is_member($group)) {
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throw new \moodle_exception('nopermissiontoshow');
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}
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}
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if (!$survey = $DB->get_record("survey", array("id" => $cm->instance))) {
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throw new \moodle_exception('invalidsurveyid', 'survey');
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}
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// Check to see if groups are being used in this survey.
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if ($group) {
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$users = get_users_by_capability($context, 'mod/survey:participate', '', '', '', '', $group, null, false);
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} else if (!empty($cm->groupingid)) {
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$groups = groups_get_all_groups($courseid, 0, $cm->groupingid);
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$groups = array_keys($groups);
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$users = get_users_by_capability($context, 'mod/survey:participate', '', '', '', '', $groups, null, false);
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} else {
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$users = get_users_by_capability($context, 'mod/survey:participate', '', '', '', '', '', null, false);
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$group = false;
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}
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$stractual = get_string("actual", "survey");
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$stractualclass = get_string("actualclass", "survey");
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$strpreferred = get_string("preferred", "survey");
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$strpreferredclass = get_string("preferredclass", "survey");
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if ($sid || isset($user)) {
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$stractualstudent = get_string("actualstudent", "survey", fullname($user));
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$strpreferredstudent = get_string("preferredstudent", "survey", fullname($user));
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}
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$virtualscales = false; // Set default value for case clauses.
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switch ($type) {
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case "question.png":
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$question = $DB->get_record("survey_questions", array("id" => $qid));
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$question->text = wordwrap(get_string($question->text, "survey"), SURVEY_QLENGTH_WRAP);
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$question->options = get_string($question->options, "survey");
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$options = explode(",", $question->options);
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foreach ($options as $key => $unused) {
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$buckets1[$key] = 0;
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$buckets2[$key] = 0;
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}
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if ($aaa = $DB->get_records('survey_answers', array('survey' => $cm->instance, 'question' => $qid))) {
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foreach ($aaa as $aa) {
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if (!$group or isset($users[$aa->userid])) {
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if ($a1 = $aa->answer1) {
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$buckets1[$a1 - 1]++;
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}
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if ($a2 = $aa->answer2) {
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$buckets2[$a2 - 1]++;
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}
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}
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}
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}
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$maxbuckets1 = max($buckets1);
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$maxbuckets2 = max($buckets2);
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$maxbuckets = ($maxbuckets1 > $maxbuckets2) ? $maxbuckets1 : $maxbuckets2;
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$graph = new graph($SURVEY_GWIDTH, $SURVEY_GHEIGHT);
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$graph->parameter['title'] = "$question->text";
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$graph->x_data = $options;
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$graph->y_data['answers1'] = $buckets1;
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$graph->y_format['answers1'] = array('colour' => 'ltblue', 'bar' => 'fill', 'legend' => $stractual, 'bar_size' => 0.4);
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$graph->y_data['answers2'] = $buckets2;
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$graph->y_format['answers2'] = array('colour' => 'ltorange', 'bar' => 'fill', 'legend' => $strpreferred, 'bar_size' => 0.2);
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$graph->parameter['legend'] = 'outside-top';
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$graph->parameter['legend_border'] = 'black';
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$graph->parameter['legend_offset'] = 4;
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if (($maxbuckets1 > 0.0) && ($maxbuckets2 > 0.0)) {
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$graph->y_order = array('answers1', 'answers2');
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} else if ($maxbuckets1 > 0.0) {
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$graph->y_order = array('answers1');
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} else {
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$graph->y_order = array('answers2');
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}
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$graph->parameter['y_axis_gridlines'] = $maxbuckets + 1;
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$graph->parameter['y_resolution_left'] = 1;
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$graph->parameter['y_decimal_left'] = 0;
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$graph->parameter['x_axis_angle'] = 20;
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$graph->parameter['shadow'] = 'none';
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$graph->y_tick_labels = null;
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$graph->offset_relation = null;
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$graph->draw_stack();
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break;
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case "multiquestion.png":
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$question = $DB->get_record("survey_questions", array("id" => $qid));
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$question->text = get_string($question->text, "survey");
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$question->options = get_string($question->options, "survey");
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$options = explode(",", $question->options);
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$questionorder = explode(",", $question->multi);
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$qqq = $DB->get_records_list("survey_questions", "id", explode(',', $question->multi));
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foreach ($questionorder as $i => $val) {
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$names[$i] = get_string($qqq["$val"]->shorttext, "survey");
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$buckets1[$i] = 0;
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$buckets2[$i] = 0;
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$count1[$i] = 0;
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$count2[$i] = 0;
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$indexof[$val] = $i;
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$stdev1[$i] = 0;
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$stdev2[$i] = 0;
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}
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$aaa = $DB->get_records_select("survey_answers", "((survey = ?) AND (question in ($question->multi)))",
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array($cm->instance));
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if ($aaa) {
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foreach ($aaa as $a) {
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if (!$group or isset($users[$a->userid])) {
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$index = $indexof[$a->question];
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if ($a->answer1) {
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$buckets1[$index] += $a->answer1;
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$count1[$index]++;
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}
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if ($a->answer2) {
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$buckets2[$index] += $a->answer2;
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$count2[$index]++;
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}
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}
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}
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}
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foreach ($questionorder as $i => $val) {
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if ($count1[$i]) {
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$buckets1[$i] = (float) $buckets1[$i] / (float) $count1[$i];
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}
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if ($count2[$i]) {
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$buckets2[$i] = (float) $buckets2[$i] / (float) $count2[$i];
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}
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}
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if ($aaa) {
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foreach ($aaa as $a) {
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if (!$group or isset($users[$a->userid])) {
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$index = $indexof[$a->question];
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if ($a->answer1) {
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$difference = (float) ($a->answer1 - $buckets1[$index]);
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$stdev1[$index] += ($difference * $difference);
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}
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if ($a->answer2) {
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$difference = (float) ($a->answer2 - $buckets2[$index]);
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$stdev2[$index] += ($difference * $difference);
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}
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}
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}
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}
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foreach ($questionorder as $i => $val) {
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if ($count1[$i]) {
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$stdev1[$i] = sqrt((float) $stdev1[$i] / ((float) $count1[$i]));
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}
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if ($count2[$i]) {
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$stdev2[$i] = sqrt((float) $stdev2[$i] / ((float) $count2[$i]));
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}
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$buckets1[$i] = $buckets1[$i] - 1;
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$buckets2[$i] = $buckets2[$i] - 1;
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}
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$maxbuckets1 = max($buckets1);
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$maxbuckets2 = max($buckets2);
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$graph = new graph($SURVEY_GWIDTH, $SURVEY_GHEIGHT);
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$graph->parameter['title'] = "$question->text";
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$graph->x_data = $names;
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$graph->y_data['answers1'] = $buckets1;
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$graph->y_format['answers1'] = array('colour' => 'ltblue', 'line' => 'line', 'point' => 'square',
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'shadow_offset' => 4, 'legend' => $stractual);
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$graph->y_data['answers2'] = $buckets2;
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$graph->y_format['answers2'] = array('colour' => 'ltorange', 'line' => 'line', 'point' => 'square',
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'shadow_offset' => 4, 'legend' => $strpreferred);
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$graph->y_data['stdev1'] = $stdev1;
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$graph->y_format['stdev1'] = array('colour' => 'ltltblue', 'bar' => 'fill',
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'shadow_offset' => '4', 'legend' => 'none', 'bar_size' => 0.3);
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$graph->y_data['stdev2'] = $stdev2;
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$graph->y_format['stdev2'] = array('colour' => 'ltltorange', 'bar' => 'fill',
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'shadow_offset' => '4', 'legend' => 'none', 'bar_size' => 0.2);
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$graph->offset_relation['stdev1'] = 'answers1';
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$graph->offset_relation['stdev2'] = 'answers2';
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$graph->parameter['bar_size'] = 0.15;
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$graph->parameter['legend'] = 'outside-top';
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$graph->parameter['legend_border'] = 'black';
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$graph->parameter['legend_offset'] = 4;
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$graph->y_tick_labels = $options;
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if (($maxbuckets1 > 0.0) && ($maxbuckets2 > 0.0)) {
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$graph->y_order = array('stdev1', 'answers1', 'stdev2', 'answers2');
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} else if ($maxbuckets1 > 0.0) {
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$graph->y_order = array('stdev1', 'answers1');
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} else {
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$graph->y_order = array('stdev2', 'answers2');
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}
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$graph->parameter['y_max_left'] = count($options) - 1;
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$graph->parameter['y_axis_gridlines'] = count($options);
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$graph->parameter['y_resolution_left'] = 1;
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$graph->parameter['y_decimal_left'] = 1;
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$graph->parameter['x_axis_angle'] = 20;
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$graph->draw();
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break;
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case "overall.png":
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$qqq = $DB->get_records_list("survey_questions", "id", explode(',', $survey->questions));
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foreach ($qqq as $key => $qq) {
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if ($qq->multi) {
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$qqq[$key]->text = get_string($qq->text, "survey");
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$qqq[$key]->options = get_string($qq->options, "survey");
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if ($qq->type < 0) {
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$virtualscales = true;
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}
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}
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}
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foreach ($qqq as $qq) { // If any virtual, then use JUST virtual, else use JUST nonvirtual.
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if ($qq->multi) {
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311 |
if ($virtualscales && $qq->type < 0) {
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$question[] = $qq;
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} else if (!$virtualscales && $qq->type > 0) {
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$question[] = $qq;
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}
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}
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}
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$numquestions = count($question);
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$options = explode(",", $question[0]->options);
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321 |
$numoptions = count($options);
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322 |
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323 |
for ($i = 0; $i < $numquestions; $i++) {
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$names[$i] = $question[$i]->text;
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325 |
$buckets1[$i] = 0.0;
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326 |
$buckets2[$i] = 0.0;
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327 |
$stdev1[$i] = 0.0;
|
|
|
328 |
$stdev2[$i] = 0.0;
|
|
|
329 |
$count1[$i] = 0;
|
|
|
330 |
$count2[$i] = 0;
|
|
|
331 |
$subquestions = $question[$i]->multi; // Otherwise next line doesn't work.
|
|
|
332 |
$aaa = $DB->get_records_select("survey_answers", "((survey = ?) AND (question in ($subquestions)))",
|
|
|
333 |
array($cm->instance));
|
|
|
334 |
|
|
|
335 |
if ($aaa) {
|
|
|
336 |
foreach ($aaa as $a) {
|
|
|
337 |
if (!$group or isset($users[$a->userid])) {
|
|
|
338 |
if ($a->answer1) {
|
|
|
339 |
$buckets1[$i] += $a->answer1;
|
|
|
340 |
$count1[$i]++;
|
|
|
341 |
}
|
|
|
342 |
if ($a->answer2) {
|
|
|
343 |
$buckets2[$i] += $a->answer2;
|
|
|
344 |
$count2[$i]++;
|
|
|
345 |
}
|
|
|
346 |
}
|
|
|
347 |
}
|
|
|
348 |
}
|
|
|
349 |
|
|
|
350 |
if ($count1[$i]) {
|
|
|
351 |
$buckets1[$i] = (float) $buckets1[$i] / (float) $count1[$i];
|
|
|
352 |
}
|
|
|
353 |
if ($count2[$i]) {
|
|
|
354 |
$buckets2[$i] = (float) $buckets2[$i] / (float) $count2[$i];
|
|
|
355 |
}
|
|
|
356 |
|
|
|
357 |
// Calculate the standard devaiations.
|
|
|
358 |
if ($aaa) {
|
|
|
359 |
foreach ($aaa as $a) {
|
|
|
360 |
if (!$group or isset($users[$a->userid])) {
|
|
|
361 |
if ($a->answer1) {
|
|
|
362 |
$difference = (float) ($a->answer1 - $buckets1[$i]);
|
|
|
363 |
$stdev1[$i] += ($difference * $difference);
|
|
|
364 |
}
|
|
|
365 |
if ($a->answer2) {
|
|
|
366 |
$difference = (float) ($a->answer2 - $buckets2[$i]);
|
|
|
367 |
$stdev2[$i] += ($difference * $difference);
|
|
|
368 |
}
|
|
|
369 |
}
|
|
|
370 |
}
|
|
|
371 |
}
|
|
|
372 |
|
|
|
373 |
if ($count1[$i]) {
|
|
|
374 |
$stdev1[$i] = sqrt((float) $stdev1[$i] / ((float) $count1[$i]));
|
|
|
375 |
}
|
|
|
376 |
if ($count2[$i]) {
|
|
|
377 |
$stdev2[$i] = sqrt((float) $stdev2[$i] / ((float) $count2[$i]));
|
|
|
378 |
}
|
|
|
379 |
|
|
|
380 |
$buckets1[$i] = $buckets1[$i] - 1; // Hack because there should not be ANY 0 values in the data.
|
|
|
381 |
$buckets2[$i] = $buckets2[$i] - 1;
|
|
|
382 |
|
|
|
383 |
}
|
|
|
384 |
|
|
|
385 |
$maxbuckets1 = max($buckets1);
|
|
|
386 |
$maxbuckets2 = max($buckets2);
|
|
|
387 |
|
|
|
388 |
$graph = new graph($SURVEY_GWIDTH, $SURVEY_GHEIGHT);
|
|
|
389 |
$graph->parameter['title'] = strip_tags(format_string($survey->name, true));
|
|
|
390 |
|
|
|
391 |
$graph->x_data = $names;
|
|
|
392 |
|
|
|
393 |
$graph->y_data['answers1'] = $buckets1;
|
|
|
394 |
$graph->y_format['answers1'] = array('colour' => 'ltblue', 'line' => 'line', 'point' => 'square',
|
|
|
395 |
'shadow_offset' => 4, 'legend' => $stractual);
|
|
|
396 |
$graph->y_data['answers2'] = $buckets2;
|
|
|
397 |
$graph->y_format['answers2'] = array('colour' => 'ltorange', 'line' => 'line', 'point' => 'square',
|
|
|
398 |
'shadow_offset' => 4, 'legend' => $strpreferred);
|
|
|
399 |
|
|
|
400 |
$graph->y_data['stdev1'] = $stdev1;
|
|
|
401 |
$graph->y_format['stdev1'] = array('colour' => 'ltltblue', 'bar' => 'fill',
|
|
|
402 |
'shadow_offset' => '4', 'legend' => 'none', 'bar_size' => 0.3);
|
|
|
403 |
$graph->y_data['stdev2'] = $stdev2;
|
|
|
404 |
$graph->y_format['stdev2'] = array('colour' => 'ltltorange', 'bar' => 'fill',
|
|
|
405 |
'shadow_offset' => '4', 'legend' => 'none', 'bar_size' => 0.2);
|
|
|
406 |
$graph->offset_relation['stdev1'] = 'answers1';
|
|
|
407 |
$graph->offset_relation['stdev2'] = 'answers2';
|
|
|
408 |
|
|
|
409 |
$graph->parameter['legend'] = 'outside-top';
|
|
|
410 |
$graph->parameter['legend_border'] = 'black';
|
|
|
411 |
$graph->parameter['legend_offset'] = 4;
|
|
|
412 |
|
|
|
413 |
$graph->y_tick_labels = $options;
|
|
|
414 |
|
|
|
415 |
if (($maxbuckets1 > 0.0) && ($maxbuckets2 > 0.0)) {
|
|
|
416 |
$graph->y_order = array('stdev1', 'answers1', 'stdev2', 'answers2');
|
|
|
417 |
} else if ($maxbuckets1 > 0.0) {
|
|
|
418 |
$graph->y_order = array('stdev1', 'answers1');
|
|
|
419 |
} else {
|
|
|
420 |
$graph->y_order = array('stdev2', 'answers2');
|
|
|
421 |
}
|
|
|
422 |
|
|
|
423 |
$graph->parameter['y_max_left'] = $numoptions - 1;
|
|
|
424 |
$graph->parameter['y_axis_gridlines'] = $numoptions;
|
|
|
425 |
$graph->parameter['y_resolution_left'] = 1;
|
|
|
426 |
$graph->parameter['y_decimal_left'] = 1;
|
|
|
427 |
$graph->parameter['x_axis_angle'] = 0;
|
|
|
428 |
$graph->parameter['x_inner_padding'] = 6;
|
|
|
429 |
|
|
|
430 |
$graph->draw();
|
|
|
431 |
|
|
|
432 |
break;
|
|
|
433 |
|
|
|
434 |
case "student.png":
|
|
|
435 |
|
|
|
436 |
$qqq = $DB->get_records_list("survey_questions", "id", explode(',', $survey->questions));
|
|
|
437 |
|
|
|
438 |
foreach ($qqq as $key => $qq) {
|
|
|
439 |
if ($qq->multi) {
|
|
|
440 |
$qqq[$key]->text = get_string($qq->text, "survey");
|
|
|
441 |
$qqq[$key]->options = get_string($qq->options, "survey");
|
|
|
442 |
if ($qq->type < 0) {
|
|
|
443 |
$virtualscales = true;
|
|
|
444 |
}
|
|
|
445 |
}
|
|
|
446 |
}
|
|
|
447 |
foreach ($qqq as $qq) { // If any virtual, then use JUST virtual, else use JUST nonvirtual.
|
|
|
448 |
if ($qq->multi) {
|
|
|
449 |
if ($virtualscales && $qq->type < 0) {
|
|
|
450 |
$question[] = $qq;
|
|
|
451 |
} else if (!$virtualscales && $qq->type > 0) {
|
|
|
452 |
$question[] = $qq;
|
|
|
453 |
}
|
|
|
454 |
}
|
|
|
455 |
}
|
|
|
456 |
$numquestions = count($question);
|
|
|
457 |
|
|
|
458 |
$options = explode(",", $question[0]->options);
|
|
|
459 |
$numoptions = count($options);
|
|
|
460 |
|
|
|
461 |
for ($i = 0; $i < $numquestions; $i++) {
|
|
|
462 |
$names[$i] = $question[$i]->text;
|
|
|
463 |
$buckets1[$i] = 0.0;
|
|
|
464 |
$buckets2[$i] = 0.0;
|
|
|
465 |
$count1[$i] = 0;
|
|
|
466 |
$count2[$i] = 0;
|
|
|
467 |
$studbuckets1[$i] = 0.0;
|
|
|
468 |
$studbuckets2[$i] = 0.0;
|
|
|
469 |
$studcount1[$i] = 0;
|
|
|
470 |
$studcount2[$i] = 0;
|
|
|
471 |
$stdev1[$i] = 0.0;
|
|
|
472 |
$stdev2[$i] = 0.0;
|
|
|
473 |
|
|
|
474 |
$subquestions = $question[$i]->multi; // Otherwise next line doesn't work.
|
|
|
475 |
$aaa = $DB->get_records_select("survey_answers", "((survey = ?) AND (question in ($subquestions)))",
|
|
|
476 |
array($cm->instance));
|
|
|
477 |
|
|
|
478 |
if ($aaa) {
|
|
|
479 |
foreach ($aaa as $a) {
|
|
|
480 |
if (!$group or isset($users[$a->userid])) {
|
|
|
481 |
if ($a->userid == $sid) {
|
|
|
482 |
if ($a->answer1) {
|
|
|
483 |
$studbuckets1[$i] += $a->answer1;
|
|
|
484 |
$studcount1[$i]++;
|
|
|
485 |
}
|
|
|
486 |
if ($a->answer2) {
|
|
|
487 |
$studbuckets2[$i] += $a->answer2;
|
|
|
488 |
$studcount2[$i]++;
|
|
|
489 |
}
|
|
|
490 |
}
|
|
|
491 |
if ($a->answer1) {
|
|
|
492 |
$buckets1[$i] += $a->answer1;
|
|
|
493 |
$count1[$i]++;
|
|
|
494 |
}
|
|
|
495 |
if ($a->answer2) {
|
|
|
496 |
$buckets2[$i] += $a->answer2;
|
|
|
497 |
$count2[$i]++;
|
|
|
498 |
}
|
|
|
499 |
}
|
|
|
500 |
}
|
|
|
501 |
}
|
|
|
502 |
|
|
|
503 |
if ($count1[$i]) {
|
|
|
504 |
$buckets1[$i] = (float) $buckets1[$i] / (float) $count1[$i];
|
|
|
505 |
}
|
|
|
506 |
if ($count2[$i]) {
|
|
|
507 |
$buckets2[$i] = (float) $buckets2[$i] / (float) $count2[$i];
|
|
|
508 |
}
|
|
|
509 |
if ($studcount1[$i]) {
|
|
|
510 |
$studbuckets1[$i] = (float) $studbuckets1[$i] / (float) $studcount1[$i];
|
|
|
511 |
}
|
|
|
512 |
if ($studcount2[$i]) {
|
|
|
513 |
$studbuckets2[$i] = (float) $studbuckets2[$i] / (float) $studcount2[$i];
|
|
|
514 |
}
|
|
|
515 |
|
|
|
516 |
// Calculate the standard devaiations.
|
|
|
517 |
foreach ($aaa as $a) {
|
|
|
518 |
if (!$group or isset($users[$a->userid])) {
|
|
|
519 |
if ($a->answer1) {
|
|
|
520 |
$difference = (float) ($a->answer1 - $buckets1[$i]);
|
|
|
521 |
$stdev1[$i] += ($difference * $difference);
|
|
|
522 |
}
|
|
|
523 |
if ($a->answer2) {
|
|
|
524 |
$difference = (float) ($a->answer2 - $buckets2[$i]);
|
|
|
525 |
$stdev2[$i] += ($difference * $difference);
|
|
|
526 |
}
|
|
|
527 |
}
|
|
|
528 |
}
|
|
|
529 |
|
|
|
530 |
if ($count1[$i]) {
|
|
|
531 |
$stdev1[$i] = sqrt((float) $stdev1[$i] / ((float) $count1[$i]));
|
|
|
532 |
}
|
|
|
533 |
if ($count2[$i]) {
|
|
|
534 |
$stdev2[$i] = sqrt((float) $stdev2[$i] / ((float) $count2[$i]));
|
|
|
535 |
}
|
|
|
536 |
|
|
|
537 |
$buckets1[$i] = $buckets1[$i] - 1; // Hack because there should not be ANY 0 values in the data.
|
|
|
538 |
$buckets2[$i] = $buckets2[$i] - 1;
|
|
|
539 |
$studbuckets1[$i] = $studbuckets1[$i] - 1;
|
|
|
540 |
$studbuckets2[$i] = $studbuckets2[$i] - 1;
|
|
|
541 |
|
|
|
542 |
}
|
|
|
543 |
|
|
|
544 |
$maxbuckets1 = max($buckets1);
|
|
|
545 |
$maxbuckets2 = max($buckets2);
|
|
|
546 |
|
|
|
547 |
$graph = new graph($SURVEY_GWIDTH, $SURVEY_GHEIGHT);
|
|
|
548 |
$graph->parameter['title'] = strip_tags(format_string($survey->name, true));
|
|
|
549 |
|
|
|
550 |
$graph->x_data = $names;
|
|
|
551 |
|
|
|
552 |
$graph->y_data['answers1'] = $buckets1;
|
|
|
553 |
$graph->y_format['answers1'] = array('colour' => 'ltblue', 'line' => 'line', 'point' => 'square',
|
|
|
554 |
'shadow_offset' => 0.1, 'legend' => $stractualclass);
|
|
|
555 |
$graph->y_data['answers2'] = $buckets2;
|
|
|
556 |
$graph->y_format['answers2'] = array('colour' => 'ltorange', 'line' => 'line', 'point' => 'square',
|
|
|
557 |
'shadow_offset' => 0.1, 'legend' => $strpreferredclass);
|
|
|
558 |
$graph->y_data['studanswers1'] = $studbuckets1;
|
|
|
559 |
$graph->y_format['studanswers1'] = array('colour' => 'blue', 'line' => 'line', 'point' => 'square',
|
|
|
560 |
'shadow_offset' => 4, 'legend' => $stractualstudent);
|
|
|
561 |
$graph->y_data['studanswers2'] = $studbuckets2;
|
|
|
562 |
$graph->y_format['studanswers2'] = array('colour' => 'orange', 'line' => 'line', 'point' => 'square',
|
|
|
563 |
'shadow_offset' => 4, 'legend' => $strpreferredstudent);
|
|
|
564 |
$graph->y_data['stdev1'] = $stdev1;
|
|
|
565 |
$graph->y_format['stdev1'] = array('colour' => 'ltltblue', 'bar' => 'fill',
|
|
|
566 |
'shadow_offset' => 0.1, 'legend' => 'none', 'bar_size' => 0.3);
|
|
|
567 |
$graph->y_data['stdev2'] = $stdev2;
|
|
|
568 |
$graph->y_format['stdev2'] = array('colour' => 'ltltorange', 'bar' => 'fill',
|
|
|
569 |
'shadow_offset' => 0.1, 'legend' => 'none', 'bar_size' => 0.2);
|
|
|
570 |
$graph->offset_relation['stdev1'] = 'answers1';
|
|
|
571 |
$graph->offset_relation['stdev2'] = 'answers2';
|
|
|
572 |
|
|
|
573 |
$graph->y_tick_labels = $options;
|
|
|
574 |
|
|
|
575 |
$graph->parameter['bar_size'] = 0.15;
|
|
|
576 |
|
|
|
577 |
$graph->parameter['legend'] = 'outside-top';
|
|
|
578 |
$graph->parameter['legend_border'] = 'black';
|
|
|
579 |
$graph->parameter['legend_offset'] = 4;
|
|
|
580 |
|
|
|
581 |
if (($maxbuckets1 > 0.0) && ($maxbuckets2 > 0.0)) {
|
|
|
582 |
$graph->y_order = array('stdev1', 'stdev2', 'answers1', 'answers2', 'studanswers1', 'studanswers2');
|
|
|
583 |
} else if ($maxbuckets1 > 0.0) {
|
|
|
584 |
$graph->y_order = array('stdev1', 'answers1', 'studanswers1');
|
|
|
585 |
} else {
|
|
|
586 |
$graph->y_order = array('stdev2', 'answers2', 'studanswers2');
|
|
|
587 |
}
|
|
|
588 |
|
|
|
589 |
$graph->parameter['y_max_left'] = $numoptions - 1;
|
|
|
590 |
$graph->parameter['y_axis_gridlines'] = $numoptions;
|
|
|
591 |
$graph->parameter['y_resolution_left'] = 1;
|
|
|
592 |
$graph->parameter['y_decimal_left'] = 1;
|
|
|
593 |
$graph->parameter['x_axis_angle'] = 20;
|
|
|
594 |
|
|
|
595 |
$graph->draw();
|
|
|
596 |
break;
|
|
|
597 |
|
|
|
598 |
case "studentmultiquestion.png":
|
|
|
599 |
|
|
|
600 |
$question = $DB->get_record("survey_questions", array("id" => $qid));
|
|
|
601 |
$question->text = get_string($question->text, "survey");
|
|
|
602 |
$question->options = get_string($question->options, "survey");
|
|
|
603 |
|
|
|
604 |
$options = explode(",", $question->options);
|
|
|
605 |
$questionorder = explode(",", $question->multi);
|
|
|
606 |
|
|
|
607 |
$qqq = $DB->get_records_list("survey_questions", "id", explode(',', $question->multi));
|
|
|
608 |
|
|
|
609 |
foreach ($questionorder as $i => $val) {
|
|
|
610 |
$names[$i] = get_string($qqq[$val]->shorttext, "survey");
|
|
|
611 |
$buckets1[$i] = 0;
|
|
|
612 |
$buckets2[$i] = 0;
|
|
|
613 |
$count1[$i] = 0;
|
|
|
614 |
$count2[$i] = 0;
|
|
|
615 |
$indexof[$val] = $i;
|
|
|
616 |
$studbuckets1[$i] = 0.0;
|
|
|
617 |
$studbuckets2[$i] = 0.0;
|
|
|
618 |
$studcount1[$i] = 0;
|
|
|
619 |
$studcount2[$i] = 0;
|
|
|
620 |
$stdev1[$i] = 0.0;
|
|
|
621 |
$stdev2[$i] = 0.0;
|
|
|
622 |
}
|
|
|
623 |
|
|
|
624 |
$aaa = $DB->get_records_select("survey_answers", "((survey = ?) AND (question in ($question->multi)))",
|
|
|
625 |
array($cm->instance));
|
|
|
626 |
|
|
|
627 |
if ($aaa) {
|
|
|
628 |
foreach ($aaa as $a) {
|
|
|
629 |
if (!$group or isset($users[$a->userid])) {
|
|
|
630 |
$index = $indexof[$a->question];
|
|
|
631 |
if ($a->userid == $sid) {
|
|
|
632 |
if ($a->answer1) {
|
|
|
633 |
$studbuckets1[$index] += $a->answer1;
|
|
|
634 |
$studcount1[$index]++;
|
|
|
635 |
}
|
|
|
636 |
if ($a->answer2) {
|
|
|
637 |
$studbuckets2[$index] += $a->answer2;
|
|
|
638 |
$studcount2[$index]++;
|
|
|
639 |
}
|
|
|
640 |
}
|
|
|
641 |
if ($a->answer1) {
|
|
|
642 |
$buckets1[$index] += $a->answer1;
|
|
|
643 |
$count1[$index]++;
|
|
|
644 |
}
|
|
|
645 |
if ($a->answer2) {
|
|
|
646 |
$buckets2[$index] += $a->answer2;
|
|
|
647 |
$count2[$index]++;
|
|
|
648 |
}
|
|
|
649 |
}
|
|
|
650 |
}
|
|
|
651 |
}
|
|
|
652 |
|
|
|
653 |
foreach ($questionorder as $i => $val) {
|
|
|
654 |
if ($count1[$i]) {
|
|
|
655 |
$buckets1[$i] = (float) $buckets1[$i] / (float) $count1[$i];
|
|
|
656 |
}
|
|
|
657 |
if ($count2[$i]) {
|
|
|
658 |
$buckets2[$i] = (float) $buckets2[$i] / (float) $count2[$i];
|
|
|
659 |
}
|
|
|
660 |
if ($studcount1[$i]) {
|
|
|
661 |
$studbuckets1[$i] = (float) $studbuckets1[$i] / (float) $studcount1[$i];
|
|
|
662 |
}
|
|
|
663 |
if ($studcount2[$i]) {
|
|
|
664 |
$studbuckets2[$i] = (float) $studbuckets2[$i] / (float) $studcount2[$i];
|
|
|
665 |
}
|
|
|
666 |
}
|
|
|
667 |
|
|
|
668 |
foreach ($aaa as $a) {
|
|
|
669 |
if (!$group or isset($users[$a->userid])) {
|
|
|
670 |
$index = $indexof[$a->question];
|
|
|
671 |
if ($a->answer1) {
|
|
|
672 |
$difference = (float) ($a->answer1 - $buckets1[$index]);
|
|
|
673 |
$stdev1[$index] += ($difference * $difference);
|
|
|
674 |
}
|
|
|
675 |
if ($a->answer2) {
|
|
|
676 |
$difference = (float) ($a->answer2 - $buckets2[$index]);
|
|
|
677 |
$stdev2[$index] += ($difference * $difference);
|
|
|
678 |
}
|
|
|
679 |
}
|
|
|
680 |
}
|
|
|
681 |
|
|
|
682 |
foreach ($questionorder as $i => $val) {
|
|
|
683 |
if ($count1[$i]) {
|
|
|
684 |
$stdev1[$i] = sqrt((float) $stdev1[$i] / ((float) $count1[$i]));
|
|
|
685 |
}
|
|
|
686 |
if ($count2[$i]) {
|
|
|
687 |
$stdev2[$i] = sqrt((float) $stdev2[$i] / ((float) $count2[$i]));
|
|
|
688 |
}
|
|
|
689 |
$buckets1[$i] = $buckets1[$i] - 1; // Hack because there should not be ANY 0 values in the data.
|
|
|
690 |
$buckets2[$i] = $buckets2[$i] - 1;
|
|
|
691 |
$studbuckets1[$i] = $studbuckets1[$i] - 1;
|
|
|
692 |
$studbuckets2[$i] = $studbuckets2[$i] - 1;
|
|
|
693 |
}
|
|
|
694 |
|
|
|
695 |
$maxbuckets1 = max($buckets1);
|
|
|
696 |
$maxbuckets2 = max($buckets2);
|
|
|
697 |
|
|
|
698 |
$graph = new graph($SURVEY_GWIDTH, $SURVEY_GHEIGHT);
|
|
|
699 |
$graph->parameter['title'] = "$question->text";
|
|
|
700 |
|
|
|
701 |
$graph->x_data = $names;
|
|
|
702 |
$graph->y_data['answers1'] = $buckets1;
|
|
|
703 |
$graph->y_format['answers1'] = array('colour' => 'ltblue', 'line' => 'line', 'point' => 'square',
|
|
|
704 |
'shadow_offset' => 0.1, 'legend' => $stractualclass);
|
|
|
705 |
$graph->y_data['answers2'] = $buckets2;
|
|
|
706 |
$graph->y_format['answers2'] = array('colour' => 'ltorange', 'line' => 'line', 'point' => 'square',
|
|
|
707 |
'shadow_offset' => 0.1, 'legend' => $strpreferredclass);
|
|
|
708 |
$graph->y_data['studanswers1'] = $studbuckets1;
|
|
|
709 |
$graph->y_format['studanswers1'] = array('colour' => 'blue', 'line' => 'line', 'point' => 'square',
|
|
|
710 |
'shadow_offset' => 4, 'legend' => $stractualstudent);
|
|
|
711 |
$graph->y_data['studanswers2'] = $studbuckets2;
|
|
|
712 |
$graph->y_format['studanswers2'] = array('colour' => 'orange', 'line' => 'line', 'point' => 'square',
|
|
|
713 |
'shadow_offset' => 4, 'legend' => $strpreferredstudent);
|
|
|
714 |
$graph->y_data['stdev1'] = $stdev1;
|
|
|
715 |
$graph->y_format['stdev1'] = array('colour' => 'ltltblue', 'bar' => 'fill',
|
|
|
716 |
'shadow_offset' => 0.1, 'legend' => 'none', 'bar_size' => 0.3);
|
|
|
717 |
$graph->y_data['stdev2'] = $stdev2;
|
|
|
718 |
$graph->y_format['stdev2'] = array('colour' => 'ltltorange', 'bar' => 'fill',
|
|
|
719 |
'shadow_offset' => 0.1, 'legend' => 'none', 'bar_size' => 0.2);
|
|
|
720 |
$graph->offset_relation['stdev1'] = 'answers1';
|
|
|
721 |
$graph->offset_relation['stdev2'] = 'answers2';
|
|
|
722 |
|
|
|
723 |
$graph->parameter['bar_size'] = 0.15;
|
|
|
724 |
|
|
|
725 |
$graph->parameter['legend'] = 'outside-top';
|
|
|
726 |
$graph->parameter['legend_border'] = 'black';
|
|
|
727 |
$graph->parameter['legend_offset'] = 4;
|
|
|
728 |
|
|
|
729 |
$graph->y_tick_labels = $options;
|
|
|
730 |
|
|
|
731 |
if (($maxbuckets1 > 0.0) && ($maxbuckets2 > 0.0)) {
|
|
|
732 |
$graph->y_order = array('stdev1', 'stdev2', 'answers1', 'answers2', 'studanswers1', 'studanswers2');
|
|
|
733 |
} else if ($maxbuckets1 > 0.0) {
|
|
|
734 |
$graph->y_order = array('stdev1', 'answers1', 'studanswers1');
|
|
|
735 |
} else {
|
|
|
736 |
$graph->y_order = array('stdev2', 'answers2', 'studanswers2');
|
|
|
737 |
}
|
|
|
738 |
|
|
|
739 |
$graph->parameter['y_max_left'] = count($options) - 1;
|
|
|
740 |
$graph->parameter['y_axis_gridlines'] = count($options);
|
|
|
741 |
$graph->parameter['y_resolution_left'] = 1;
|
|
|
742 |
$graph->parameter['y_decimal_left'] = 1;
|
|
|
743 |
$graph->parameter['x_axis_angle'] = 20;
|
|
|
744 |
|
|
|
745 |
$graph->draw();
|
|
|
746 |
|
|
|
747 |
break;
|
|
|
748 |
|
|
|
749 |
default:
|
|
|
750 |
break;
|
|
|
751 |
}
|
|
|
752 |
|
|
|
753 |
exit;
|