Uncaught TypeError: Cannot read property 'arrayToDataTable' undefined

Je suis confronté à cette erreur ne sais pas pourquoi cette erreur est à venir. J'utilise codeigniter et c'est jquery erreur.

C'est mon afficher la page

<script>
$(function() {
    $("#accordion").accordion({
        collapsible: true,
        heightStyle: "content"
    });
});

var data = google.visualization.arrayToDataTable([
    ['Attendance Type', 'Count'],
    ['Present', <?php echo $student_attendance_count['present']; ?>],
    ['Absent', <?php echo $student_attendance_count['absent']; ?>],
    ['On Leave', <?php echo $student_attendance_count['leave']; ?>],
    ['Attendance Not Maked', <?php echo $attendance_not_marked; ?>]
]);

var options = {
    title: 'My Daily Activities'
};

var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
</script>

C'est ma page HTML vérifier cette référence. Si vous avez besoin de plus de détails, je vais l'ajouter ici. Je ne sais pas comment cette erreur est à venir.

<div id="accordion">
<h3><span class="accordion_header">Student Strength</span></h3>
<div>
<table>
<tr>
<td>
<div id="chart_div" style="width: 500px; height: 300px;"></div>
</td>
<td style="vertical-align: top">
<table class="list">
<tr>
<td style="width: 200px;"><b>Total student</b></td>
<td style="width: 50px;" class="text-right"><?php echo $total_student_count; ?></td>
</tr>
<tr>
<td class="attendance_color_present"><b>Present</b></td>
<td class="text-right attendance_color_present"><?php echo $student_attendance_count['present']; ?></td>
</tr>
<tr>
<td class="attendance_color_absent"><b>Absent</b></td>
<td class="text-right attendance_color_absent"><?php echo $student_attendance_count['absent']; ?></td>
</tr>
<tr>
<td class="attendance_color_leave"><b>Leave</b></td>
<td class="text-right attendance_color_leave"><?php echo $student_attendance_count['leave']; ?></td>
</tr>
<tr>
<td><b>Attendance Not Marked</b></td>
<td class="text-right"><?php echo $attendance_not_marked =  $total_student_count - ($student_attendance_count['present'] + $student_attendance_count['absent'] + $student_attendance_count['leave']); ?></td>
</tr>
</table>
</td>
</tr>
</table>
</div>
<h3><span class="accordion_header">Attendance Details</span></h3>
<div>
<div class="data_listing" style="margin-left: auto">
<table class="list"  align="center" style="margin: 0px auto; width: 70%">
<thead>
<tr>
<th style="width: 10%; text-align:center">Sr. No.</th>
<th style="width: 60%">Class Name</th>
<th style="width: 30%; text-align: center">Attendance Status</th>
</tr>
</thead>
<?php
$i = 1;
$attendance_marked = 0;
foreach ($class_section_attendance as $class) {
if ($class['attendance_marked'] == 1) {
$image = '<img src ="' . base_url() . 'resources/images/icons/tick_circle.png" title="Attendance Marked" alt="Attendance Marked"/>';
$attendance_marked++;
} else {
$image = '<img src ="' . base_url() . 'resources/images/icons/cross.png" title="Attendance Not Marked" alt="Attendance Not Marked"/>';
}
echo '<tr>';
echo '<td style="text-align:center">' . $i++ . '</td>';
echo '<td>' . $class['name'] . '</td>';
echo '<td style="text-align:center">' . $image . '</td>';
echo '</tr>';
}
$not_marked = count($class_section_attendance) - $attendance_marked;
echo '<tr><td colspan="3" style="text-align:center">Total Classes : <b>' . count($class_section_attendance) . '</b> | Attendaced Marked : <b>' . $attendance_marked . '</b> | Not Marked : <b>' . $not_marked . '</b> </td></tr>';
?>
</table>
</div>
</div>
</div>

S'il vous plaît aider moi.

OriginalL'auteur Vaibhav Dass | 2014-05-28