Axis *yAxis();

Retrieves the Axis object representing the primary y-axis of the XYChart.

By default, the primary y-axis is the y-axis on the left side of the plot area (bottom side if XYChart.swapXY is in effect), and the secondary y-axis is on the right side of the plot area (top side if XYChart.swapXY is in effect). You may interchange their positions using XYChart.setYAxisOnRight.

None

The Axis object representing the primary y-axis of the XYChart.