-
DESCENDING
DESC
-
reverses the order of the response categories. If both the DESCENDING and ORDER=
options are specified, PROC FMM orders the response categories according to the ORDER=
option and then reverses that order.
-
EVENT=’category’ | keyword
-
specifies the event category for the binary response model. PROC FMM models the probability of the event category. You can
specify the value (formatted, if a format is applied) of the event category in quotes, or you can specify one of the following
keywords:
-
FIRST
-
designates the first ordered category as the event. This is the default.
-
LAST
-
designates the last ordered category as the event.
-
ORDER=order-type
-
specifies the sort order for the levels of the response variable. You can specify the following values for order-type:
-
DATA
-
sorts the levels by order of appearance in the input data set.
-
FORMATTED
-
sorts the levels by external formatted value, except for numeric variables with no explicit format, which are sorted by their
unformatted (internal) value.
-
FREQ
-
sorts the levels by descending frequency count; levels with the most observations come first in the order.
-
INTERNAL
-
sorts the levels by unformatted value.
-
FREQDATA
-
sorts the levels by order of descending frequency count, and within counts by order of appearance in the input data set when
counts are tied.
-
FREQFORMATTED
-
sorts the levels by order of descending frequency count, and within counts by formatted value (as above) when counts are tied.
-
FREQINTERNAL
-
sorts the levels by order of descending frequency count, and within counts by unformatted value when counts are tied.
When 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 FMM run or in the DATA step that created the data set), the
levels are ordered by their internal (numeric) value. If you specify the ORDER= option in the MODEL statement and the ORDER=
option in the PROC FMM
statement, the former takes precedence.
By default, ORDER=FORMATTED. For the FORMATTED and INTERNAL values, 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
SAS Language Reference: Concepts.
-
REFERENCE=’category’ | keyword
REF=’category’ | keyword
-
specifies the reference category for categorical models. For the binary response model, specifying one response category as
the reference is the same as specifying the other response category as the event category. You can specify the value (formatted
if a format is applied) of the reference category in quotes, or you can specify one of the following keywords:
-
FIRST
-
designates the first ordered category as the reference category.
-
LAST
-
designates the last ordered category as the reference category. This is the default.
The reference category in multinomial models and multinomial cluster models is determined by the order in which you specify
the response variables.
