dplyr 按多个变量分组按多个变量汇总

Question

R 新手。使用dplyr，尝试group_by多个变量，通过多个变量，多个函数进行汇总。

这按预期工作

mtcars %>% 
+     group_by(cyl,hp) %>% 
+     summarise(min_mpg = min(mpg) , min_disp = min(disp), max_mpg = max(mpg) , max_disp = max(disp))

但是当我尝试用我的 df 进行复制时

vmp %>% 
    +     group_by(Priority,LOS) %>% 
    +     summarise(inv_total = sum(Inv_Total), sr_count = count(SR_Nmbr))

我收到此错误：

Error in summarise_impl(.data, dots) : Evaluation error: no applicable method for 'groups' applied to an object of class "factor".

我做错了什么？谢谢

Answer 1

library(dplyr)
vmp %>%
     mutate(Inv_Total=as.numeric(as.character(Inv_Total))) %>% 
     group_by(Priority,LOS) %>%
     summarise(sr_count=n(), 
               inv_total=sum(Inv_Total))

Answer 2

我们可以使用type.convert自动转换列类型

vmp %>%
    mutate_all(funs(type.convert(as.character(.), as.is = TRUE))) %>%
    group_by(Priority, LOS) %>%
    summarise(inv_total = sum(Inv_Total), sr_count =n())

dplyr 按多个变量分组按多个变量汇总

dplyr group by multiple variables summarise by multiple variables

r

rstudio

dplyr

tidyverse

dplyr 按多个变量分组 按多个变量汇总

dplyr group by multiple variables summarise by multiple variables

r

rstudio

dplyr

tidyverse

dplyr 按多个变量分组按多个变量汇总