我用
haven
创建了一个带标签的列。
library(dplyr)
library(haven)
df <- tibble(x = labelled(c(1:3, NA), c('a' = 1, 'b' = 2, 'missing' = NA)))
# # A tibble: 4 × 1
# x
# <int+lbl>
# 1 1 [a]
# 2 2 [b]
# 3 3
# 4 NA
我好像是缺失值标注失败。我希望看到像
这样的东西# # A tibble: 4 × 1
# x
# <int+lbl>
# 1 1 [a]
# 2 2 [b]
# 3 3
# 4 NA [missing]
此外,
as_factor
给
as_factor(df$x)
# [1] a b 3 <NA>
# Levels: a b 3 missing
但我想要
# [1] a b 3 missing
# Levels: a b 3 missing
tagged_na
:
x <- labelled(c(1:3, tagged_na("")), c('a' = 1, 'b' = 2, "missing" = tagged_na("")))
<labelled<double>[4]>
[1] 1 2 3 NA
Labels:
value label
1 a
2 b
NA missing
按预期与
as_factor
一起工作:
as_factor(x)
#[1] a b 3 missing
#Levels: a b 3 missing