groups

groups lists the distinct groups of varlist occurring in the dataset and their frequencies  and/or percents.  groups is perhaps most useful with categorical variables, but has other  uses. Groups are by default presented in the sort order of varlist. Note that there is no limit on the number of variables in varlist. 公卫百科

Frequencies are counts or other measures of abundance.

Percents are percents of each total frequency.



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