What is ref in SAS?
Note: The REF= option for setting reference levels was added to the GLM, MIXED, GLIMMIX, and ORTHOREG beginning in SAS 9.3 TS1M2. Also in that release, the REF= option was made available for use with the GLM parameterization in procedures where it had only been available with other parameterizations.
How do I change the reference variable in SAS?
Unfortunately, changing the reference in SAS is awkward for other procedures. The SAS default is to make the last category the referent, when last is determined by ordering the characters. To change this, use the order option, frequently an option to the class statement but sometimes an option to the proc statement.
What is Param SAS?
A parameter is a variable whose value can be changed and that can be referenced by other objects. SAS Visual Analytics supports parameters for controls in reports. If a control has an associated parameter, then when the value of the control changes, the parameter is assigned that changed value.
What are SAS classes?
The CLASS statement names the classification variables to be used in the model. Typical classification variables are Treatment , Sex , Race , Group , and Replication . Note: Prior to SAS 9, class levels were determined by using no more than the first 16 characters of the formatted values.
What is class in PROC GLM?
The CLASS statement names the classification variables to be used in the model. Typical classification variables are Treatment , Sex , Race , Group , and Replication . If you use the CLASS statement, it must appear before the MODEL statement. Classification variables can be either character or numeric.
What is input parameter?
An input parameter is a placeholder for a value or values in a mapping. You define the value of the parameter when you configure the. mapping. task. You can create an input parameter for logical aspects of a data flow.
What is a stored process in SAS?
A stored process is a SAS program that is stored on a server and can be executed as required by requesting applications. You can use stored processes for Web reporting, analytics, building Web applications, delivering packages to clients or to the middle tier, and publishing results to channels or repositories.
What is a CLASS variable SAS?
The CLASS statement names variables to be analyzed as categorical variables. The CLASS variables are one or more variables in the DATA= input data set. These variables can be either character or numeric. The formatted values of the CLASS variables determine the categorical variable levels.
What is CLASS and model in SAS?
What happens to a reference line in SAS?
By default, if a reference line is created outside of the data range, then the reference line is not visible. This option has no effect if you do not create reference lines that are outside of the data range. This option is available with SAS 9.2 Phase 2 and later. specifies the degree of transparency for the reference lines.
Is the ref option available in SAS 9.3?
Also in that release, the REF= option was made available for use with the GLM parameterization in procedures where it had only been available with other parameterizations. In releases prior to SAS 9.3 TS1M2, and in later releases of some procedures such as PROBIT, LIFEREG, and GAM, the REF= option in the CLASS statement is not available.
When to use Ref first or ref last in class statement?
Alternatively, you can specify REF=FIRST to designate that the first ordered level serve as the reference, or REF=LAST to designate that the last ordered level serve as the reference. To specify that REF=FIRST or REF=LAST be used for all classification variables, use the REF= global-option after the slash (/) in the CLASS statement.
How to group values into levels in SAS?
In any case, you can use formats to group values into levels. See the discussion of the FORMAT procedure in the Base SAS Procedures Guide and the discussions of the FORMAT statement and SAS formats in SAS Formats and Informats: Reference. You can adjust the order of CLASS variable levels with the ORDER= option in the PROC MIXED statement.