CODEWITHSUNDEEP
rvector
Adrian
Adrian

Reputation: 9793

R: how to re-order vector elements by name

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

I have a vector with 4 elements. I'd like to reorder them so the vector contains "North", "South", "West", "East". I know one way of re-ordering them via indices as follows.

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

But is there a way to re-order them by name? Something along the lines of s["North", "South", "West," "East"] (which does not work). Note that each element in the vector is unique.

Upvotes: 1

Views: 65

Answers (1)

MKR
MKR

Reputation: 20095

Though I'm not sure if it will fit your purpose but one option is to convert your vector to ordered factor and then sort it. 

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

Upvotes: 3

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