attach() Warning in R: The following objects are masked (2 Examples)

In this tutorial, I’ll show how to deal with the attach function warning “The following objects are masked” in the R programming language.

Creating Example Data

iris_A <- iris[1:50, ]        # Create two iris subsets
iris_B <- iris[51:100, ]

Example 1: Replicating the Warning – The following objects are masked

attach(iris_A)                # Applying attach()
attach(iris_B)                # Applying attach()
# The following objects are masked from iris_A:
#   
#   Petal.Length, Petal.Width, Sepal.Length, Sepal.Width, Species

Example 2: Solving the Warning – The following objects are masked

attach(iris_A)                # Applying attach()
detach(iris_A)                # Applying detach()
attach(iris_B)                # Applying attach()

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