"Shift" the Values of a Vector Ahead or Behind by a Specified Amount

Source: R/shifter.R

This function "shifts" the values of a vector by a specified amount. For instance, if you are starting with a vector, "x", where the range of values is between 1 and 10, and you want 10 to be replaced by 9, 9 to be replaced by 8, and so on, with 1 being ultimately replaced by 10, this funciton should be of use.

shifter(x = 1:10, n = 1)

Arguments

x

The range that you are shifting
n

How much of a shift you want

Value

A vector of shifted values

References

http://stackoverflow.com/a/20825012/1270695

Author

Ananda Mahto

Examples


set.seed(1)
X <- sample(10, 20, replace = TRUE)
X
#>  [1]  9  4  7  1  2  7  2  3  1  5  5 10  6 10  7  9  5  5  9  9

shifter()[X]
#>  [1] 10  5  8  2  3  8  3  4  2  6  6  1  7  1  8 10  6  6 10 10
shifter(n = -2)[X]
#>  [1]  7  2  5  9 10  5 10  1  9  3  3  8  4  8  5  7  3  3  7  7