錯誤Summary.factor（1L，na.rm = FALSE）：總和不有意義的因素骨料

Question

我有類似questiln作爲This link

value <- 1:10 
Name <- c(rep("A",5),rep("B",5)) 
data <- data.frame(Name, value) 

我的方法使用聚合是

> aggregate(factor(Name) ~ value, data=data, FUN="sum") 
Error in Summary.factor(1L, na.rm = FALSE) : 
    sum not meaningful for factors 

而我按照鏈接，同時有相同的錯誤

> data[] <- lapply(data, function(x) type.convert(as.character(x))) 
> aggregate(Name ~ value, data, sum) 
Error in Summary.factor(1L, na.rm = FALSE) : 
    sum not meaningful for factors 

謝謝

Answer 1

必須切換Name和value：

aggregate(value ~ Name, data = data, FUN = "sum") 
    Name value 
1 A 15 
2 B 40