R 从另一个向量中排除向量的元素，不使用setdiff

我有一个字符向量，我想从中排除第二个向量中存在的元素。在这种情况下，我不知道如何在考虑整个向量的情况下求反

vector[vector ! %in% vector2]

显然，我可以做

vector[vector！=单个字符]

，但这只适用于单个字符。

你很接近了

vector[!vector %in% vector2]

或者，即使你说“不使用setdiff”

---

vector1您可以定义一个新运算符

 `%ni%` = Negate(`%in%`)

现在有了更优雅的解决方案：

library(textclean)
# master character vector
vector1 = c("blue", "green", "red")
# vector containing elements to be removed from master vector
vector2 = c("green", "red")
drop_element_fixed(vector1, vector2)

# Output:
# [1] "blue"

 `%ni%` = Negate(`%in%`)

library(textclean)
# master character vector
vector1 = c("blue", "green", "red")
# vector containing elements to be removed from master vector
vector2 = c("green", "red")
drop_element_fixed(vector1, vector2)

# Output:
# [1] "blue"