The GANTT Procedure
- Overview
- Getting Started
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Syntax
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Details
Schedule Data Set Missing Values in Input Data Sets Specifying the PADDING= Option Page Format Multiple Calendars and Holidays Full-Screen Version Graphics Version Specifying the Logic Options Automatic Text Annotation Web-Enabled Gantt Charts Mode-Specific Differences Displayed Output Macro Variable ORGANTT Computer Resource Requirements ODS Style Definitions
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Examples
Line-Printer Examples Printing a Gantt Chart Customizing the Gantt Chart Graphics Examples Marking Holidays Marking Milestones and Special Dates Using the COMPRESS Option Using the MININTERVAL= and SCALE= Options Using the MINDATE= and MAXDATE= Options Variable Length Holidays Multiple Calendars Plotting the Actual Schedule Comparing Progress Against a Baseline Schedule Using the COMBINE Option Plotting the Resource-Constrained Schedule Specifying the Schedule Data Directly BY Processing Gantt Charts by Persons Using the HEIGHT= and HTOFF= Options Drawing a Logic Gantt Chart Using AON Representation Specifying the Logic Control Options Nonstandard Precedence Relationships Using the SAS/GRAPH ANNOTATE= Option Using the Automatic Text Annotation Feature Multiproject Gantt Charts Multisegment Gantt Charts Zoned Gantt Charts Web-Enabled Gantt Charts Using the CHARTWIDTH= Option Using the TIMEAXISFORMAT= Option Statement and Option Cross-Reference Tables
- References
| Page Format |
The GANTT procedure divides the observations (activities) into a number of subgroups of approximately equal numbers. The size of each group is determined by the PAGESIZE system option. Similarly, the time axis is divided into a number of approximately equal divisions depending on the LINESIZE system option.
If the FILL option is specified, however, each page is filled as completely as possible before plotting on a new page. If both axes are split, the pages are ordered with the chart for each group of activities being plotted completely (the time axis occupying several consecutive pages, if needed) before proceeding to the next group.
If a BY statement is used, each BY group is formatted separately.
Two options that control the format of the chart are the MININTERVAL= and SCALE= options. The value for the MININTERVAL= option, denoted by mininterval, is the smallest time interval unit to be identified on the chart. The value for the SCALE= option, denoted by scale, is the number of columns to be used to denote one unit of mininterval. For example, if MININTERVAL=MONTH and SCALE=10, the chart is formatted so that 10 columns denote the period of one month. The first of these 10 columns denotes the start of the month and the last denotes the end, with each column representing approximately three days. Further, the INCREMENT= option can be used to control the labeling. In this example, if INCREMENT=2, then the time axis would have labels for alternate months.
Specifying the MININTERVAL= Option
The value specified for the MININTERVAL= option is the smallest time interval unit to be identified on the chart. If the time values being plotted are SAS date values, the valid values for mininterval are DAY, WEEK, MONTH, QTR, or YEAR. If the values are SAS datetime values, valid values for mininterval are DTSECOND, DTMINUTE, DTHOUR, DTDAY, DTWEEK, DTMONTH, DTQTR, or DTYEAR. If they are SAS time values, then valid values are SECOND, MINUTE, or HOUR.
Note: If the times being plotted are SAS datetime values and mininterval is either DTSECOND, DTMINUTE, or DTHOUR, the output generated could run into several thousands of pages. Therefore, be careful when choosing a value for mininterval.
Table 8.4 shows the default values of mininterval corresponding to different formats of the times being plotted on the chart.
Format |
MININTERVAL= Value |
DATEw. |
DAY |
DATETIMEw.d |
DTDAY |
HHMMw.d |
HOUR |
MONYYw. |
MONTH |
TIMEw.d |
HOUR |
YYMMDDw. |
MONTH |
YYQw. |
MONTH |
Labeling on the Time Axis
If the variables being plotted in the chart are unformatted numeric values, the time axis is labeled by the corresponding numbers in increments specified by the INCREMENT= option. However, if the variables have date, datetime, or time formats, then the time axis is labeled with two or three lines. Each line is determined by the value of mininterval, which in turn is determined by the format of the plotted times (see Table 8.4). Table 8.5 illustrates the format of the label corresponding to different values of mininterval.
MININTERVAL= Value |
First Line |
Second Line |
Third Line |
DAY, WEEK, DTWEEK |
Month |
Day |
|
MONTH, QTR, YEAR, DTMONTH, DTQTR, DTYEAR |
Year |
Month |
|
DTSECOND, DTMINUTE, DTHOUR, DTDAY |
Month |
Day |
Time |
SECOND, MINUTE, HOUR |
Time |