a dashed vertical line dividing two sets of rectangular bars.

 library(ggplot2)

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

 # Create a mock dataset for the left visualization
 left_data <- data.frame(
   group = c(rep("A", 5), rep("B", 3)),
   value = c(1, 2, 3, 4, 5, 6, 7, 8)
 )

 left_plot <- ggplot(left_data, aes(x=group, y=value)) +
   geom_col(position="dodge") +
   geom_vline(xintercept=1.5, linetype="dashed") +
   theme_minimal()

 # Create a mock dataset for the right visualization
 right_data <- data.frame(
   x = 1:20,
   y = rnorm(20, 10, 5),
   group = sample(c("red", "blue"), 20, replace=TRUE)
 )

 right_plot <- ggplot(right_data, aes(x=x, y=y)) +
   geom_col(aes(fill="blue"), width=0.5) +
   geom_point(aes(color=group), size=4, position=position_jitter(width=0.3, height=0)) +
   scale_color_manual(values=c("red"="red", "blue"="blue")) +
   theme_minimal()

 # Combine and display the plots
 library(gridExtra)
 png("plot1.png", width=800, height=800)
 grid.arrange(left_plot, right_plot, ncol=2)
 dev.off()

a bar plot with overlaid scatter points in two colors.