How to access elements of a vector by negative indexing in R?

How to access elements of a vector by negative indexing in R?

How to access elements of a vector by negative indexing in R?

This recipe helps you access elements of a vector by negative indexing in R


Recipe Objective

How to access elements of a vector by negative indexing in R? The negative index drops the element at the specified index position, counting from the start position. This can be used to return a set of vector values except for those which we don't want. Syntax — x[( )] specifies the index location/position of the element we wish to remove. This recipe illustrates an example on how to access elements by negative indexing.

Step 1 - Define a vector

a <- c("a","b","c","d","e","f","g")

Step 2 - Apply negative indexing

b <- a[c(-2,-5)] # drops "b" and "e" print(b)
 "Output of the code is" :  "a" "c" "d" "f" "g"

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