Agenda

• build scatter plots
• modify point
  • color
  • fill
  • alpha
  • shape
  • size
• fit regression line

Intro

A scatter plot displays the relationship between two continuous variables. In ggplot2, we can build a scatter plot using geom_point(). Scatterplots can show you visually

• the strength of the relationship between the variables
• the direction of the relationship between the variables
• and whether outliers exist

Libraries

library(ggplot2)
library(dplyr)
library(tidyr)

Basic Plot

ggplot(mtcars) +
  geom_point(aes(disp, mpg))

Jitter

ggplot(mtcars) +
  geom_point(aes(disp, mpg), position = 'jitter')