An array that holds the annotation(s) used to segregate the variables ala Facet way in R. It must be categories in the data.z object
array
[]
Area,
AreaLine,
Bar,
Boxplot,
DotLine,
Dotplot,
Heatmap,
Line,
Pie,
Sankey,
Scatter2D,
Scatter3D,
ScatterBubble2D,
Stacked,
StackedLine,
StackedPercent,
StackedPercentLine