Produces a separate plot for each BY group.
BY <DESCENDING> variable-1
<...<DESCENDING> variable-n>
<NOTSORTED>;
|
- 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, then either the observations in the data set must
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 is grouped in another way, for example,
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
that have the same values for the BY variables are not contiguous, then the
procedure treats each contiguous set as a separate BY group.
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