# How to Apply the duplicated Function in R (Example Code)

In this tutorial you’ll learn how to use the duplicated command in the R programming language.

## Example: Applying duplicated() Function to Elements of Vector

x <- c(1:3, 2:4) # Constructing example vector x # Displaying vector in RStudio console # [1] 1 2 3 2 3 4 |

x <- c(1:3, 2:4) # Constructing example vector x # Displaying vector in RStudio console # [1] 1 2 3 2 3 4

duplicated(x) # Return logical vector # [1] FALSE FALSE FALSE TRUE TRUE FALSE |

duplicated(x) # Return logical vector # [1] FALSE FALSE FALSE TRUE TRUE FALSE

x[!duplicated(x)] # Subset unique vector elements # [1] 1 2 3 4 |

x[!duplicated(x)] # Subset unique vector elements # [1] 1 2 3 4