2 Exercises (Chapter 2)

Why does this code not work?
```
my_variable <- 10
my_varıable
```
Look carefully! (This may seem like an exercise in pointlessness, but training your brain to notice even the tiniest difference will pay off when programming.)

Answer

Your answer here.

Tweak each of the following R commands so that they run correctly:

libary(todyverse)
ggplot(dTA = mpg) + 
  geom_point(maping = aes(x = displ y = hwy)) +
  geom_smooth(method = "lm)

Answer

# Your R code here

Press Option + Shift + K / Alt + Shift + K. What happens? How can you get to the same place using the menus?

Answer

Your answer here.

Let’s revisit an exercise from “Saving Your Plots”. Run the following lines of code. Which of the two plots is saved as mpg-plot.png? Why?

my_bar_plot <- ggplot(mpg, aes(x = class)) +
  geom_bar()
my_scatter_plot <- ggplot(mpg, aes(x = cty, y = hwy)) +
  geom_point()
ggsave(filename = "mpg-plot.png", plot = my_bar_plot)

Answer

my_bar_plot <- ggplot(mpg, aes(x = class)) +
  geom_bar()
my_scatter_plot <- ggplot(mpg, aes(x = cty, y = hwy)) +
  geom_point()
ggsave(filename = "mpg-plot.png", plot = my_bar_plot)

Saving 7 x 5 in image

Your answer here.