The GANTT Procedure

Missing Values in Input Data Sets

Table 8.2 summarizes the treatment of missing values for variables in the input data sets used by PROC GANTT.

Table 8.2: 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 section Displayed Output

 

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