我试图使用dcast从reshape2将数据帧从long转换到wide。Person + Object : non-numeric argument to binary operatorPerson car watch bike phone skateboard motorcycle TV
A 1(df, Person ~ . + Object, variable.var=&
我有这样的df:df<-structure(list(AEOUT = c("RECOVERED/RESOLVED", "RECOVERED/RESOLVED", The dcast generic in data.table has been passed a tbl_df and will attempt toPlease do this redirection your