The HPSPLIT Procedure

CLASS Statement

  • CLASS variable <(var-options)> <variable <(var-options)> <…>> </ class-options>;

The CLASS statement causes variable to be treated as a categorical variable in the analysis. These variables enter the analysis not through their values but through levels to which the unique values are mapped. For more information about these mappings, see the section Levelization of Classification Variables.

Multiple CLASS statements are supported.

If you use the CLASS statement, it must appear before the MODEL statement.

Note: All class levels are padded or truncated to 32 characters.

By default, PROC HPSPLIT treats variables as categorical variables whose order is specified by the ORDER= option.

You can specify the following var-options:

DESC
DESCENDING

reverses the sort order of the classification variable. If you specify both the DESCENDING and ORDER= options, PROC HPSPLIT orders the categories according to the ORDER= option and then reverses that order.

ORDER=ordering

specifies the sort order for the levels of classification variables. By default, ORDER=FORMATTED except for numeric CLASS variables that have no specified format, for which ORDER=INTERNAL is the default. You can specify the following values:

FORMATTED

orders values in ascending order of the formatted value.

INTERNAL

orders values in ascending order of the unformatted value.

You can specify the following class-options:

DESC
DESCENDING

reverses the sort order of the classification variable. If you specify both the DESCENDING and ORDER= options, PROC HPSPLIT orders the categories according to the ORDER= option and then reverse that order.

ORDER=ordering

specifies the sort order for the levels of classification variables. By default, ORDER=FORMATTED except for numeric CLASS variables that have no specified format, for which ORDER=INTERNAL is the default. You can specify the following values:

FORMATTED

orders values in ascending order of the formatted value.

INTERNAL

orders values in ascending order of the unformatted value.

UPCASE

uppercases the values of character-valued CLASS variables before levelizing them. For example, if the UPCASE option is in effect and a CLASS variable can take the values 'a', 'A', and 'b', then 'a' and 'A' represent the same level and the CLASS variable is treated as having only two values: 'A' and 'B'.

Last updated: December 09, 2022