- Dim.Names<-c("o2name","o1name","brandNAME","flName","djName","AGE")
- for(i in 1:6){
- DIM<-Dim.Names[i]
- DIM_W_S<-summaryBy(PRICE/10000~DIM+as.factor(DATE),
- data=GSL1,
- FUN=sum,na.rm=TRUE,keep.names=TRUE,var.names="PRICE")
- DIM.P<-ggplot(DIM_W_S,
- aes(x=DATE,y=PRICE,group=Dim.Names[i],colour=Dim.Names[i]))+
- geom_line()+
- geom_point()
-
- print(DIM.P)
- }
问题:summaryBy并不能识别在formula部分中被赋值的DIM ,要怎么办



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