求教
proc logistic data=outfish2;
class Species;
model Species= Length Width / covb;
by _Imputation_;
ods output ParameterEstimates=lgsparms;
run;
proc mianalyze parms=lgsparms;
modeleffects Intercept Length Width;
run;
这是 sas help里关于 汇总多重填补后的数据做logistic回归模型的结果。想问问,如果自变量 width是多分类不是而分类该代码要如何调整呢?