Layer.yZoneColor

`[C#]`	`public int yZoneColor(double threshold, int belowColor, int aboveColor [, Axis yAxis ]);`
`[VB]`	`Public Function yZoneColor(threshold As Double, belowColor As Integer, aboveColor As Integer [, yAxis As Axis ]) As Integer`

Creates a y-zone color. A y-zone color will change from one color to another depending on a threshold value on the y-axis.

For example, if a y-zone color is used as the fill color in an area layer, the area will switch from one color to another when its value is higher than a certain value on the y-axis.

The two colors used in a y-zone color can be other dynamic colors. You may create y-zone colors with more than 2 zones by cascading multiple y-zone colors.

Argument	Default	Description
threshold	(Mandatory)	The y value serving as the threshold for switching between two colors.
belowColor	(Mandatory)	The color to use when the y-axis value of the pixel is smaller than the threshold.
aboveColor	(Mandatory)	The color to use when the y-axis value of the pixel is greater than the threshold.
yAxis	[Null]	The y-axis to use to determine the pixel coordinates of data values. The y-axis may be obtained using XYChart.yAxis, XYChart.yAxis2 or XYChart.addAxis. The default is to use the primary y-axis. For backward compatibility, the axis argument can also be a boolean value. A true value means the primary y-axis. A false value means the secondary y-axis.