Number of Times an Entry Occurrs in a Data Frame in R (2 Examples)
In this article you’ll learn how to count a certain entry occurrs in a data frame in the R programming language.
Creation of Exemplifying Data
data(iris) # Load example data head(iris) # 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 |
data(iris) # Load example data head(iris) # 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: Number of Times a Value Occurs in a Specific Data Frame Column
sum(iris$Sepal.Length == 5) # Count in single variable # [1] 10 |
sum(iris$Sepal.Length == 5) # Count in single variable # [1] 10
Example 2: Number of Times a Value Occurs in an Entire Data Frame
sum(iris == 5) # Count in all variables # [1] 14 |
sum(iris == 5) # Count in all variables # [1] 14
Related Tutorials & Further Resources
You may find some further R programming tutorials on topics such as counting, numeric values, and variables below: