Crystal Reports for Rational Application Developer Designer Guide

Required values for chart group type "On Change of"

Chart type	Subtype	Data Fields	Category	Series
Bar	All subtypes	At least one value.	Only one value.	Only one value.
Line	All subtypes	At least one value.	Only one value.	Only one value.
Area	All subtypes	At least one value.	Only one value.	Only one value.
Pie	Pie	At least one value.	Not applicable	Only one value.
	Multiple pie	At least one value.	Only one value.	Only one value.
	Proportional multiple pie	At least one value.	Only one value.	Only one value.
Doughnut	Doughnut	At least one value.	Not applicable	Only one value.
	Multiple doughnut	At least one value.	Only one value.	Only one value.
	Proportional multiple doughnut	At least one value.	Only one value.	Only one value.
3-D Riser	All subtypes	At least one value.	Only one value.	Only one value.
3-D Surface	All subtypes	At least one value.	Only one value.	Only one value.
XY Scatter		Requires X and Y values; accepts only numeric data type.	Only one value.	Only one value.
Radar	All subtypes	At least one value.	Only one value.	Only one value.
Bubble		Requires X, Y, and size values.	Only one value.	Only one value.
Stock	High-Low	Two values required.	Only one value.	Only one value.
Stock	High-Low-Open-Close	Four values required.	Only one value.	Only one value.
Numeric Axis	All subtypes	At least one value.	Only one value.	Only one value.
Gauge		At least one value.	Only one value.	Only one value.
Gantt			Only one value.	Only one value.
Funnel		At least one value.	Only one value.	Only one value.
Histogram		At least one value.	Only one value.	Only one value.