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Hello,

Please note there's no barDirection option in the addChart method, you need to set the type option. Please check the available documentation on addChart.

If you need to create a column chart you need to set type as colChart. For example, using the same styles from your code:

$data = array(
    'legend' => array('Legend 1', 'Legend 2', 'Legend 3'),
    'data' => array(
        array(
            'name' => 'data 1',
            'values' => array(10, 20, 5),
        ),
        array(
            'name' => 'data 2',
            'values' => array(20, 60, 3),
        ),
        array(
            'name' => 'data 3',
            'values' => array(50, 33, 7),
        ),
    ),
);
$paramsChart = array(
    'data' => $data,
    'type' => 'colChart',
    'color' => '3',
    'perspective' => '10',
    'rotX' => '10',
    'rotY' => '10',
    'chartAlign' => 'center',
    'sizeX' => '10',
    'sizeY' => '10',
    'legendPos' => 'b',
    'legendOverlay' => '0',
    'border' => '1',
    'hgrid' => '3',
    'vgrid' => '0',
    'groupBar' => 'stacked',
);
$docx->addChart($paramsChart);

Regards.