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

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

Example 2: Number of Times a Value Occurs in an Entire Data Frame

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:

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