The * character indicates to match one or more characters.  All variables
    matching the pattern are returned.

    The ~ character also indicates to match one or more characters, but unlike
    *, only one variable is allowed to match.  If more than one variable
    matches, an error message is presented.

    The ? character matches one character.  All variables matching the pattern
    are returned.

    The - character indicates that all variables in the dataset, starting with
    the variable to the left of the - and ending with the variable to the
    right of the - are to be returned.

阿璇2016 发表于 2016-8-11 10:51
谢谢亲。我看到一个语句 foreach i of varlist var@ue ,估计@代表的一个字符串。