Calculates standardized values separately for each BY group.
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BY <DESCENDING> variable-1 <...<DESCENDING>
variable-n><NOTSORTED>;
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- variable
-
specifies the variable that the procedure uses to form BY
groups. You can specify more than one variable. If you do not use the NOTSORTED
option in the BY statement, the observations in the data set must either be
sorted by all the variables that you specify, or they must be indexed appropriately.
These variables are called BY variables.
- DESCENDING
-
specifies that the data set is sorted in descending order
by the variable that immediately follows the word DESCENDING in the BY statement.
- NOTSORTED
-
specifies that observations are not necessarily sorted in
alphabetic or numeric order. The data are grouped in another way, such as
chronological order.
The requirement for ordering or indexing observations according to the
values of BY variables is suspended for BY-group processing when you use the
NOTSORTED
option. In fact, the procedure does not use an index if you specify NOTSORTED.
The procedure defines a BY group as a set of contiguous observations that
have the same values for all BY variables. If observations with the same values
for the BY variables are not contiguous, the procedure treats each contiguous
set as a separate BY group.
Copyright © 2010 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
