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The Glamour of Graphics

Color examples and exercises

Transcript

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Your Turn

Copy the code below (link to it here) and follow the instructinos.

library(tidyverse)

#Your turn

#This is some data for a line chart
air <- 
  airquality %>%
  filter(Month == 5) %>%
  select(Temp, Ozone, Wind, Day) %>%
  pivot_longer(cols = 1:3)

#take this chart, and change the color of the lines so that
#Ozone is blue, Temp is orange, and Wind is green
ggplot(air) +
  geom_line(aes(x = Day, y = value, color = name)) +
  theme_minimal()


#take this plot and adjust the colors so that
#the bubbles are on a sequential scale from white to green
ggplot(mtcars) +
  geom_point(aes(x = wt, y = hp, color = mpg), size = 4, alpha = 0.8) +
  theme_minimal()


#generate some dummy data
x <- LETTERS[1:20]
y <- paste0("var", seq(1,20))
data <- expand.grid(X=x, Y=y)
data$Z <- runif(400, -5, 5)

#adjust this heatmap so that the colors
#are a diverging scale going from red to white to blue
ggplot(data, aes(X, Y, fill= Z)) + 
  geom_tile()

Learn More

These slides from Claus Wilke have helpful info on color palettes in ggplot

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Course Content

37 Lessons