How to plot side-by-side Plots with ggplot2 in R

Question

Like we are creating two plots of the dataset "iris":

Boxplot:

data("iris")
library(ggplot2)

iris1 <- ggplot(iris, aes(x = Species, y = Sepal.Length)) +
  geom_boxplot() + theme_bw()

BarPlot:

iris2 <- ggplot(iris, aes(x = Sepal.Length, fill = Species)) +
  geom_bar() + theme_bw() +
  theme(legend.position = c(0.8, 0.8))

But we want to plot these two graphs together to compare.

Answer 1

By Using gridExtra library we can easily plot with grid.arrange()

require(gridExtra)
gridExtra::grid.arrange(iris1,iris2)

There is another way to put it together by using cowplot library, as grid.arrange makes it difficult to labels the plots with letters(A, B, C,....)

library(cowplot)
plot_grid(iris1, iris2, labels = "AUTO")