Help System (web edition)

The grouping variable is given by the GROUPING parameter:
         GROUPING=<gr.vble1> 
or it can be pointed by the mask G. The grouping structure of the
grouping variable may be given in the form
         <gr.vble>=value1(label1),value2(label2), ...
The labels given in parenthesis are optional. If the grouping values
are given in ascending order then they are considered as cutpoints
for forming groups, e.g.
          KNOWLDGE=20,50,80,110,140
Values greater than the last cutpoint are treated as missing values.
The list above could be shortened by the notation 20(30)140.

You can use string variables as grouping variables. The grouping
structure of a string variable is given in the form
          <gr.vble>=symbol1,symbol2, ...
Note that only the first 8 characters of a string variable are
significant.

If the grouping structure of the grouping variable is not given then
all existing values of that variable are used.

The maximum number of groups is 32 (can be altered by the parameter
setting MAXNCL=<new limit>). The capacity of the program is mainly
limited by the requirement

   g*(p+1)*p/2 < 64000

where q is the number groups and p is the number of variables used
for forming the classification functions.

  A = More information on the DISCR operation