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R:如何按名称重新排序向量元素

vector r

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Adrian · 技术社区 · 7 年前

s <- c("West", "North", "South", "East")

我有一个向量,有4个元素。我想对它们重新排序,使向量包含 "North", "South", "West", "East" .我知道通过以下索引重新排序它们的一种方法。

s[c(2, 3, 1, 4)]

但有没有办法按名称重新订购?有点像 s["North", "South", "West," "East"] (不起作用)。注意,向量中的每个元素都是唯一的。

1 回复 | 直到 7 年前

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3

MKR 7 年前

虽然我不确定它是否符合你的目的,但有一个选择是将你的向量转换为 ordered 因素,然后 sort 它。

s <- c("West", "North", "South", "East")


s <- ordered(s, c("North", "South", "West", "East"))  #Define the order in which you want it

s <- sort(s)  #Now sort vector. This could have been done as part of previous step itself

s
# [1] North South West  East 
# Levels: North < South < West < East