R How to Show All Axis Labels of Barchart (2 Examples)

data(iris)                           # Load iris
iris_new <- iris[c(1, 51, 101), ]    # Modify iris
iris_new                             # Example data
#     Sepal.Length Sepal.Width Petal.Length Petal.Width    Species
# 1            5.1         3.5          1.4         0.2     setosa
# 51           7.0         3.2          4.7         1.4 versicolor
# 101          6.3         3.3          6.0         2.5  virginica

data(iris) # Load iris iris_new <- iris[c(1, 51, 101), ] # Modify iris iris_new # Example data # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 5.1 3.5 1.4 0.2 setosa # 51 7.0 3.2 4.7 1.4 versicolor # 101 6.3 3.3 6.0 2.5 virginica

barplot(iris_new$Petal.Length ~      # Draw regular barplot in Base R
          iris_new$Species)

barplot(iris_new$Petal.Length ~ # Draw regular barplot in Base R iris_new$Species)

barplot(iris_new$Petal.Length ~      # Barplot with smaller labels
          iris_new$Species,
        las = 2,
        cex.names = 0.5)

barplot(iris_new$Petal.Length ~ # Barplot with smaller labels iris_new$Species, las = 2, cex.names = 0.5)

install.packages("ggplot2")          # Install & load ggplot2 package
library("ggplot2")

install.packages("ggplot2") # Install & load ggplot2 package library("ggplot2")

ggplot(iris_new,                     # Barplot with smaller labels
       aes(Species,
           Petal.Length)) +
  geom_bar(stat = "identity") +
  theme(axis.text.x = element_text(angle = 90,
                                   size = 5))

ggplot(iris_new, # Barplot with smaller labels aes(Species, Petal.Length)) + geom_bar(stat = "identity") + theme(axis.text.x = element_text(angle = 90, size = 5))