/**
* Initialize the renderer and overwrite it with an 2:1 ration renderer
*/
protected function init()
{
$this->renderer = new SVGRenderer(100, 100);
$this->setAxis(Axis::createLinearAxis());
}
/**
* Factory method, create an Axis instance using Linear ticks as the unit
*
* @return Axis The axis that has been created
* @see LinearUnit
*/
public static function createLinearAxis()
{
$axis = new Axis();
$axis->setUnitForXAxis(self::linearUnit());
$axis->setUnitForYAxis(self::linearUnit());
return $axis;
}