Error in aggregate.data.frame – arguments must have same length in R (2 Examples)

In this tutorial you’ll learn how to solve the “Error in aggregate.data.frame(as.data.frame(x), …) : arguments must have same length” in the R programming language.

Creating Example Data

data(iris)                                             # Load example data
head(iris)                                             # Head of example data
#   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1          5.1         3.5          1.4         0.2  setosa
# 2          4.9         3.0          1.4         0.2  setosa
# 3          4.7         3.2          1.3         0.2  setosa
# 4          4.6         3.1          1.5         0.2  setosa
# 5          5.0         3.6          1.4         0.2  setosa
# 6          5.4         3.9          1.7         0.4  setosa

Example 1: Replicating the Error in aggregate.data.frame – arguments must have same length

aggregate(iris$Sepal.Length, list("Species"), sum)     # Using aggregate function wrong
# Error in aggregate.data.frame(as.data.frame(x), ...) : 
#   arguments must have same length

Example 2: Solving the Error in aggregate.data.frame – arguments must have same length

aggregate(iris$Sepal.Length, list(iris$Species), sum)  # Using aggregate function correct
#      Group.1     x
# 1     setosa 250.3
# 2 versicolor 296.8
# 3  virginica 329.4

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