Missing Values in Input Data Sets

The GANTT Procedure

Table 4.19 summarizes the treatment of missing values for variables in the input data sets used by PROC GANTT.

Table 4.19: Treatment of Missing Values in PROC GANTT

Data Set	Variable	Action
CALEDATA	CALID	default calendar (0 or "DEFAULT")
	_SUN_, ...,_SAT_	corresponding shift for default calendar
	D_LENGTH	DAYLENGTH, if available; else, 8:00, if INTERVAL=WORKDAY or DTWRKDAY; 24:00, otherwise
DATA	A_FINISH	value ignored
	A_START	value ignored
	ACTIVITY	input error: logic options are ignored
	B_FINISH	value ignored
	B_START	value ignored
	CALID	default calendar (0 or "DEFAULT")
	CHART	value ignored
	DUR	nonzero
	E_FINISH	value ignored
	E_START	value ignored
	HEADNODE	input error: logic options are ignored
	ID	missing
	L_FINISH	value ignored
	L_START	value ignored
	LAG	FS
	S_FINISH	value ignored
	S_START	value ignored
	SEGMT_NO	See the "Displayed Output" section
	SUCCESSOR	value ignored
	TAILNODE	input error: logic options are ignored
	ZONE	zone value
HOLIDATA	CALID	holiday applies to all calendars defined
	HOLIDAY	observation ignored
	HOLIDUR	ignored, if HOLIFIN is not missing; else, 1.0
	HOLIFIN	ignored, if HOLIDUR is not missing; else, HOLIDAY + (1 unit of INTERVAL)
LABDATA	_ALABEL	0
	_CLABEL	CTEXT=
	_FLABEL	FONT=
	_HLABEL	1
	_JLABEL	L
	_LABEL	use _LVAR
	_LVAR	value ignored
	_PAGEBRK	0
	_RLABEL	0
	_X	use _XVAR
	_XOFFSET	0
	_XVAR	value ignored
	_XSYS	DATA
	_Y	use LABVAR=
	_YOFFSET	0
	_YSYS	DATA
	LABVAR	value ignored
PRECDATA	ACTIVITY	input error: logic options are ignored
	LAG	FS
	SUCCESSOR	value ignored
WORKDATA	any numeric variable	00:00, if first observation; 24:00, otherwise