R Combine Factor Level Groups of Data Frame Column (Example Code)
This tutorial shows how to regroup factor levels of a factor vector or column in the R programming language.
Creation of Example Data
data(iris) # Loading example data head(iris$Species) # [1] setosa setosa setosa setosa setosa setosa # Levels: setosa versicolor virginica |
data(iris) # Loading example data head(iris$Species) # [1] setosa setosa setosa setosa setosa setosa # Levels: setosa versicolor virginica
Example: Regroup Factor Column of Data Frame Using levels() Function in R
iris_new <- iris # Replicating data frame levels(iris_new$Species) <- c("virginica", # Changing factor levels "versicolor", "virginica") head(iris_new$Species) # Display new factor column # [1] virginica virginica virginica virginica virginica virginica # Levels: virginica versicolor |
iris_new <- iris # Replicating data frame levels(iris_new$Species) <- c("virginica", # Changing factor levels "versicolor", "virginica") head(iris_new$Species) # Display new factor column # [1] virginica virginica virginica virginica virginica virginica # Levels: virginica versicolor