R Histogram with Percentage Instead of Frequency (Example Code)
This tutorial shows how to use the hist() function to draw a histogram with percent in the R programming language.
Construction of Example Data
data(iris) # Loading 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) # Loading 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
hist(iris$Sepal.Length) # Default y-axis |
hist(iris$Sepal.Length) # Default y-axis
Example: Create Histogram with Percentage on Y-axis
values_hist <- hist(iris$Sepal.Length, # Histogram with percent plot = FALSE) values_hist$density <- 100 * (values_hist$counts / sum(values_hist$counts)) plot(values_hist, freq = FALSE) |
values_hist <- hist(iris$Sepal.Length, # Histogram with percent plot = FALSE) values_hist$density <- 100 * (values_hist$counts / sum(values_hist$counts)) plot(values_hist, freq = FALSE)