Specifies the type of graph
string
Bar
Bar,
Line,
Area,
AreaLine,
BarLine,
Boxplot,
Dotplot,
DotLine,
Fish,
Gantt,
Meter,
Heatmap,
Stacked,
StackedLine,
StackedPercent,
StackedPercentLine,
Tree,
Treemap,
TagCloud,
ParallelCoordinates,
Sankey,
Scatter2D,
ScatterBubble2D,
Scatter3D,
Correlation,
Pie,
Venn,
Network,
Genome,
Circular
Area,
AreaLine,
Bar,
BarLine,
Boxplot,
Circular,
Correlation,
DotLine,
Dotplot,
Fish,
Gantt,
Genome,
Heatmap,
Line,
Map,
Network,
ParallelCoordinates,
Pie,
Sankey,
Scatter2D,
Scatter3D,
ScatterBubble2D,
Stacked,
StackedLine,
StackedPercent,
StackedPercentLine,
TagCloud,
Tree,
Treemap,
Venn