GChart example use

g_chart_example.php

<?php

$data = array(
   'labels' => array(
      array('string' => 'Sample'),
      array('number' => 'Piston 1'),
      array('number' => 'Piston 2')
   ),
   'data' => array(
      array('S1', 74.01, 74.03),
      array('S2', 74.05, 74.04),
      array('S3', 74.03, 74.01),
      array('S4', 74.00, 74.02),
      array('S5', 74.12, 74.05),
      array('S6', 74.04, 74.04),
      array('S7', 74.05, 74.06),
      array('S8', 74.03, 74.02),
      array('S9', 74.01, 74.03),
      array('S10', 74.04, 74.01),
   ),
   'title' => 'Piston Ring Diameter',
   'type' => 'line'
);

echo $this->GChart->start('test');
echo $this->GChart->visualize('test', $data);