XCHART Statement: ANOM Procedure
The basic syntax for the XCHART statement is as follows:
XCHART
response
group-variable ;
The general form of this syntax is as follows:
XCHART
responses
group-variable <(block-variables)><=symbol-variable | ='character'> <options> ;
You can use any number of XCHART statements in the ANOM procedure. The components of the XCHART statement are described as
follows.
-
response
responses
-
identify one or more responses to be analyzed. The specification of response depends on the input data set specified in the PROC ANOM statement.
A response is required. If you specify more than one response, enclose the list in parentheses. For example, the following statements
request distinct ANOM charts for the means of Weight
, Length
, and Width
:
proc anom data=Measures;
xchart (Weight Length Width)*Day;
run;
-
group-variable
-
is the variable that identifies groups in the data. The group-variable is required. In the preceding XCHART statement, Day
is the group variable.
-
block-variables
-
are optional variables that group the data into blocks of consecutive groups. The blocks are labeled in a legend, and each
block-variable provides one level of labels in the legend.
-
symbol-variable
-
is an optional variable whose levels (unique values) determine the symbol marker used to plot the means. Distinct symbol
markers are displayed for points corresponding to the various levels of the symbol-variable. You can specify the symbol markers with SYMBOLn statements.
-
options
-
enhance the appearance of the chart, request additional analyses, save results in data sets, and so on. The section Summary of Options, which follows, lists all options by function.
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