SeriesTypes

series_type and dataset combination patterns

N=Number, S=String, D=Date

series_type	values.x	values.y	values.z	remarks
scatter	N/S/D	N/S/D	-
line	S/D	N	-
line	N	S/D	-
bar	S/D	N	-
bar	N	S/D	-
stackedbar	S/D	N	-
stackedbar	N	S/D	-
bubble	N/S/D	N/S/D	N
heatmap	N/S	N/S	N	must have only one series
pie	S	N	-	must have only one series
radar	S	N	-