The GLMMOD Procedure
PROC GLMMOD Statement
PROC GLMMOD <options>;
The PROC GLMMOD statement invokes the GLMMOD procedure. Table 1 summarizes the options available in the PROC GLMMOD statement.
Table 1: PROC GLMMOD Statement Options
| Statement | Description |
|---|---|
| DATA= | Specifies the SAS data set to be used |
| NAMELEN= | Specifies the maximum length for an effect name |
| NOPRINT | Suppresses the normal display of results |
| OUTPARM= | Names an output data set describing the design matrix columns |
| OUTDESIGN= | Names an output data set to contain the columns of the design matrix |
| PREFIX= | Specifies a prefix to use in naming the columns of the design matrix |
| ZEROBASED | Modifies the numbering for the columns of the design matrix |
It has the following options:
- DATA=SAS-data-set
specifies the SAS data set to be used by the GLMMOD procedure. If you do not specify the DATA= option, the most recently created SAS data set is used.
- NAMELEN=n
specifies the maximum length for an effect name. Effect names are listed in the table of parameter definitions and stored in the EFFNAME variable in the OUTPARM= data set. By default, n = 20. You can specify
if 20 characters are not enough to distinguish between effects, which might be the case if the model includes a high-order interaction between variables with relatively long, similar names. - NOPRINT
suppresses the normal display of results. This option is generally useful only when one or more output data sets are being produced by the GLMMOD procedure. Note that this option temporarily disables the Output Delivery System (ODS); see Chapter 23, Using the Output Delivery System, for more information.
- ORDER=DATA | FORMATTED | FREQ | INTERNAL
-
specifies the sort order for the levels of the classification variables (which are specified in the CLASS statement).
This option applies to the levels for all classification variables, except when you use the (default) ORDER=FORMATTED option with numeric classification variables that have no explicit format. In that case, the levels of such variables are ordered by their internal value.
The ORDER= option can take the following values:
Value of ORDER= Levels Sorted By DATA Order of appearance in the input data set FORMATTED External formatted value, except for numeric variables with no explicit format, which are sorted by their unformatted (internal) value FREQ Descending frequency count; levels with the most observations come first in the order INTERNAL Unformatted value By default, ORDER=FORMATTED. For ORDER=FORMATTED and ORDER=INTERNAL, the sort order is machine-dependent.
For more information about sort order, see the chapter on the SORT procedure in the Base SAS Procedures Guide and the discussion of BY-group processing in the "Grouping Data" section of SAS Programmers Guide: Essentials.
- OUTPARM=SAS-data-set
names an output data set to contain the information regarding the association between model effects and design matrix columns.
- OUTDESIGN=SAS-data-set
names an output data set to contain the columns of the design matrix.
- PREFIX=name
specifies a prefix to use in naming the columns of the design matrix in the OUTDESIGN= data set. The default prefix is
Coland the column name is formed by appending the column number to the prefix, so that by default the columns are namedCol1,Col2, and so on. If you specify the ZEROBASED option, the column numbering starts at zero, so that with the default value of PREFIX= the columns of the design matrix in the OUTDESIGN= data set are namedCol0,Col1, and so on.- ZEROBASED
specifies that the numbering for the columns of the design matrix in the OUTDESIGN= data set begin at 0. By default it begins at 1, so that with the default value of PREFIX= the columns of the design matrix in the OUTDESIGN= data set are named
Col1,Col2, and so on. If you use the ZEROBASED option, the column names are insteadCol0,Col1, and so on.