PROC GLMMOD Statement

PROC GLMMOD < 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 $20 \lt n \leq 200$ if 20 characters are not enough to distinguish between effects, which may 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 15, "Using the Output Delivery System," for more information.

ORDER=DATA | FORMATTED | FREQ | INTERNAL

specifies the order in which you want the levels of the classification variables (specified in the CLASS statement) to be sorted. This ordering determines which parameters in the model correspond to each level in the data. Note that the ORDER= option applies to the levels for all classification variables. The exception is ORDER=FORMATTED (the default) for numeric variables for which you have supplied no explicit format (that is, for which there is no corresponding FORMAT statement in the current PROC GLMMOD run or in the DATA step that created the data set). In this case, the levels are ordered by their internal (numeric) value. Note that this represents a change from previous releases for how class levels are ordered. In releases previous to Version 8, numeric class levels with no explicit format were ordered by their BEST12. formatted values, and in order to revert to the previous ordering you can specify this format explicitly for the affected classification variables. The change was implemented because the former default behavior for ORDER=FORMATTED often resulted in levels not being ordered numerically and usually required the user to intervene with an explicit format or ORDER=INTERNAL to get the more natural ordering.

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

If you omit the ORDER= option, PROC GLMMOD orders by the external formatted value.

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 Col and the column name is formed by appending the column number to the prefix, so that by default the columns are named Col1, 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 named Col0, Col1, and so on.

ZEROBASED

specifies that the numbering for the columns of the design matrix in the OUTDESIGN= data set should 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 instead Col0, Col1, and so on.