There is an example setting bar direction provided in /Tests
$series->setPlotDirection(PHPExcel_Chart_DataSeries::DIRECTION_BAR);
Can't understand how you're getting every series with the same colour though.
There is an example setting bar direction provided in /Tests
$series->setPlotDirection(PHPExcel_Chart_DataSeries::DIRECTION_BAR);
Can't understand how you're getting every series with the same colour though.