# Diff Charts
Diff charts are available for bar charts, column charts, pie charts, and scatter charts. See [Google documentation](https://developers.google.com/chart/interactive/docs/gallery/diffchart).
Here you can find an example to create a diff column chart. First in your controller :
```php
public function indexAction()
{
$oldColumnChart = new ColumnChart();
$oldColumnChart->getData()->setArrayToDataTable(
[
['Name', 'Popularity'],
['Cesar', 250],
['Rachel', 4200],
['Patrick', 2900],
['Eric', 8200]
]
);
$oldColumnChart->getOptions()->getLegend()->setPosition('top');
$oldColumnChart->getOptions()->setWidth(450);
$oldColumnChart->getOptions()->setHeight(250);
$newColumnChart = new ColumnChart();
$newColumnChart->getData()->setArrayToDataTable(
[
['Name', 'Popularity'],
['Cesar', 370],
['Rachel', 600],
['Patrick', 700],
['Eric', 1500]
]
);
$newColumnChart->setOptions($oldColumnChart->getOptions());
$diffColumnChart = new DiffColumnChart($oldColumnChart, $newColumnChart);
$diffColumnChart->getOptions()->getLegend()->setPosition('top');
$diffColumnChart->getOptions()->setWidth(450);
$diffColumnChart->getOptions()->setHeight(250);
$diffColumnChart->getOptions()->getDiff()->getNewData()->setWidthFactor(0.1);
return $this->render('AppBundle::diffcol.html.twig', array(
'oldColumnChart' => $oldColumnChart,
'newColumnChart' => $newColumnChart,
'diffColumnChart' => $diffColumnChart
));
}
```
And in your template :
```twig
```