1、缺失值有数值缺失,字符缺失;
2、问题:PROC TABULATE制表CLASS有缺失,目的将缺失值与某个非缺失值归属为一类,其他的按照实际操作,剩余用OTHER.
PROC FORMAT;VALUE BASEFMT '', '0' = "01. Missing" '1' = "02. A CLASS" '2' = "03. B CLASS" OTHER = "04. OTHERS" ; RUN; /* 结果,''归在了"04. OTHER"*/ /* 经试验,将('')改成(' ')即可正确,即缺失归在了"01. Missing"*/