我想创建一个新的变量/列(WHRcat)由2个变量(WHR和sexe)在一定的条件下与dyplr,mutate和case_when。
数据:
WHR sexe WHRcat (new variable)
1.5 1
2.8 2
0.2 2
0.3 1
1.1 1
我的代码:
test<- test%>% mutate(WHRcat = case_when((WHR >= 1.02 & sexe = 1) ~ 1,
(WHR < 1.02 & sexe = 1) ~ 2,
(WHR >= 0.85 & sexe = 2) ~ 3,
(WHR < 0.85 & sexe = 2) ~ 4,
TRUE ~ 0))
虽然不工作。
错误:
> test<- test%>% mutate(WHRcat = case_when((WHR >= 1.02 & sexe = 1) ~ 1,
+ (WHR < 1.02 & sexe = 1) ~ 2,
+ (WHR >= 0.85 & sexe = 2) ~ 3,
+ (WHR < 0.85 & sexe = 2) ~ 4,
+ TRUE ~ 0))
Error in WHR >= 1.02 & sexe = 1 : could not find function "&<-"
我做错了什么?
看看这个例子,其中sould工作:
#' # case_when is particularly useful inside mutate when you want to
#' # create a new variable that relies on a complex combination of existing
#' # variables
#' starwars %>%
#' select(name:mass, gender, species) %>%
#' mutate(
#' type = case_when(
#' height > 200 | mass > 200 ~ "large",
#' species == "Droid" ~ "robot",
#' TRUE ~ "other"
#' )
#' )
从https://github.com/tidyverse/dplyr/blob/master/R/case_when.R
1条答案
按热度按时间rkue9o1l1#
问题在于使用赋值运算符
=
而不是比较运算符==