Factor (in the z data object) used to split the variables ala split in a complex heatmap. Unlike segregateVariablesBy, the split keeps a single full-width plot and only inserts a thin gap (splitSeparation) at each group boundary
string
Area,
AreaLine,
Bar,
BarLine,
Boxplot,
Bubble,
Bullet,
Chord,
Circular,
Contour,
Correlation,
Density,
DotLine,
Dotplot,
Dumbbell,
Fish,
Gantt,
Genome,
Heatmap,
Histogram,
Line,
Lollipop,
Map,
Meter,
Network,
ParallelCoordinates,
Pie,
Radar,
SPLOM,
Sankey,
Scatter2D,
Scatter3D,
ScatterBubble2D,
Stacked,
StackedLine,
StackedPercent,
StackedPercentLine,
Streamgraph,
Sunburst,
TagCloud,
Tree,
Treemap,
Venn,
Violin,
Waterfall