addTrendLayer(data [, color [, name [, depth ]]])

Adds a trend chart layer to the XYChart, and specify the data set to use for drawing the trend line.

Argument	Default	Description
data	(Mandatory)	An array of numbers representing the data set.
color	-1	The color to draw the line. -1 means that the color is automatically selected from the palette.
name	""	The name of the data set. The name will be used in the legend box, if one is available. An empty string means the data set has no name.
depth	0	The 3D depth of the line layer.

A TrendLayer object representing the trend layer created.