Syntax: PROC CUSUM Statement
The syntax for the PROC CUSUM statement is as follows:
PROC CUSUM
<options> ;
The PROC CUSUM statement starts the CUSUM procedure, and it optionally identifies various data sets. You can specify the following options in the PROC CUSUM statement. The notes Traditional Graphics and Line Printer identify options that apply only when producing traditional graphics and line printer charts, respectively.
-
ANNOTATE=SAS-data-set
ANNO=SAS-data-set -
Traditional Graphicsspecifies an input data set that contains appropriate annotate variables, as described in SAS/GRAPH: Reference. The ANNOTATE= option enables you to add features to the cusum chart (for example, labels that explain out-of-control points). The ANNOTATE= data set is used only when the chart is created as traditional graphics; it is ignored when the LINEPRINTER option is specified or ODS Graphics is enabled. The data set specified with the ANNOTATE= option in the PROC CUSUM statement is a “global” annotate data set in the sense that the information in this data set is displayed on every chart produced in the current run of the CUSUM procedure.
-
ANNOTATE2=SAS-data-set
ANNO2=SAS-data-set -
Traditional Graphicsspecifies an input data set that contains appropriate annotate variables that add features to the trend chart (secondary chart) produced with the TRENDVAR= option in the XCHART statement.
- DATA=SAS-data-set
-
names an input data set that contains raw data (measurements) as observations. If the values of the subgroup-variable are numeric, you need to sort the data set so that these values are in increasing order (within BY groups). The DATA= data set can contain more than one observation for each value of the subgroup-variable.
You cannot use a DATA= data set with a HISTORY= data set. If you do not specify a DATA= or HISTORY= data set, PROC CUSUM uses the most recently created data set as a DATA= data set. For more information, see DATA= Data Set
- FORMCHAR(index)='string'
-
Line Printerdefines characters used for features on line printer charts, where index is a list of numbers ranging from 1 to 17 and string is a character or hexadecimal string. The index identifies which features are controlled with the string characers, as described in the following table. If you specify the FORMCHAR= option and omit the index, the string controls all 17 features.
Value of index
Description of Character
Chart Feature
1
vertical bar
frame
2
horizontal bar
frame, central line
3
box character (upper left)
frame
4
box character (upper middle)
serifs, tick (horizontal axis)
5
box character (upper right)
frame
6
box character (middle left)
not used
7
box character (middle middle)
serifs
8
box character (middle right)
tick (vertical axis)
9
box character (lower left)
frame
10
box character (lower middle)
serifs
11
box character (lower right)
frame
12
vertical bar
control limits
13
horizontal bar
control limits
14
box character (upper right)
control limits
15
box character (lower left)
control limits
16
box character (lower right)
control limits
17
box character (upper left)
control limits
Not all printers can produce the characters in the preceding list. By default, the form character list specified by the SAS system option FORMCHAR= is used; otherwise, the default is FORMCHAR=’
—-+—=====’. If you print to a PC screen or if your device supports the ASCII symbol set (1 or 2), the following is recommended:
formchar='B3,C4,DA,C2,BF,C3,C5,B4,C0,C1,D9,BA,CD,BB,C8,BC,D9'X
Note that you can use the FORMCHAR= option to temporarily override the values of the SAS system FORMCHAR= option. The values of the SAS system FORMCHAR= option are not altered by the FORMCHAR= option in the PROC CUSUM statement.
- GOUT=graphics-catalog
-
Traditional Graphicsspecifies the graphics catalog for traditional graphics output from PROC CUSUM. This is useful if you want to save the output. The GOUT= option is used only when the chart is created using traditional graphics; it is ignored when the LINEPRINTER option is specified or ODS Graphics is enabled.
-
HISTORY=SAS-data-set
HIST=SAS-data-set -
names an input data set that contains subgroup summary statistics (means, standard deviations, and sample sizes). Typically, this data set is created as an OUTHISTORY= data set in a previous run of PROC CUSUM or PROC SHEWHART, but it can also be created with a SAS summarization procedure such as PROC MEANS.
If the values of the subgroup-variable are numeric, you need to sort the data set so that these values are in increasing order (within BY groups). A HISTORY= data set can contain only one observation for each value for the subgroup-variable.
You cannot use a HISTORY= data set together with a DATA= data set. If you do not specify a HISTORY= or DATA= data set, PROC CUSUM uses the most recently created data set as a DATA= data set. For more information on HISTORY= data sets, see HISTORY= Data Set.
- LIMITS=SAS-data-set
-
names an input data set that contains a set of decision interval or V-mask parameters. Each observation in a LIMITS= data set contains the parameters for a process.
If you are using SAS 6.09 or an earlier release of SAS/QC software, you must specify the options READLIMITS or READINDEX= in the XCHART statement to read the parameters from the LIMITS= data set. In SAS 6.10 and later releases, these options are not needed.
For details about the variables needed in a LIMITS= data set, see LIMITS= Data Set. If you do not provide a LIMITS= data set, you must specify the parameters with options in the XCHART statement.
- LINEPRINTER
-
Line Printerrequests that line printer charts be produced. By default, the procedure creates traditional graphics.