PolarChart.setStartAngle

Sets the angle of the radial axis, and the layout direction of radial grid lines.

The default radial axis angle is 0 degree, which means the radial axis is upward pointing.

Argument	Default	Description
startAngle	(Mandatory)	The angle of the radial axis in degrees. The upward pointing direction is 0 degree, with angle measured in the clockwise direction.
clockwise	true (non-zero)	A true (non-zero) value means the radial grid line will be laid out in the clockwise direction. A false (zero) value means the radial grid lines will be laid out in the counter-clockwise direction.