DailyR ggplot2 scatterplot

Dear Friends, I’ve decided to start up a series of posts called ‘#DailyR.’ My goal is to provide some example code to perform common tasks using R. I also want to spend a few days a week on slightly more complicated tasks, and perhaps throw in a little python every once in a while. If you like the content, please like and share! Until next time!

Major Steps

  • Use theme_set to try various pre-set themes
  • Use options to turn off scientific notation
  • Use geom_point for a simple scatter plot

Create a Scatter Plot

library(ggplot2) # load package
theme_set(theme_cowplot()) # pre-set theme
data("iris") # load data set
options(scipen=999) # turns off scientific notation

gg <- ggplot(iris, aes(x = Sepal.Length, y = Sepal.Width)) + 
  geom_point(aes(col = Species, size = Petal.Length)) + 
  xlim(c(min(iris$Sepal.Length), max(iris$Sepal.Length))) + 
  ylim(c(min(iris$Sepal.Width), max(iris$Sepal.Width))) + 
  labs(subtitle = "Sepal Length vs. Sepal Width", 
       y = "Sepal Width", 
       x = "Sepal Length", 
       title = "Scatterplot",
       caption = "Source: iris dataset")