ggplot2 exercises part 3

Scales

Choose one or two of your previous plots, and give the scales a proper name.

Hint: Use one or more scale_...() functions.
What happens if you call the same scale_...() function twice in a plot?
Add an overview over all available colorblind friendly Brewer scales to your rmarkdown document.

Hint: Insert a code chunk containing RColorBrewer::display.brewer.all(colorblindFriendly = TRUE)
Choose an appealing scale for one of your plots that use the “color” or “fill” aesthetics. Apply it with scale_..._brewer("<name>", palette = "<palette>")

Hint: Use scale_..._distiller() if you have mapped a continuous variable.
Practice Markdown: Create sections, subsections, item lists, emphasized and bold text, … .

Create a flipped boxplot of fuel economy by transmission type.
Plot highway vs. city fuel economy with an additional geom_abline() layer. How do you set a 45° degree for the diagonal line?
Try to “estimate” an approximate ratio between the two economy measures by tweaking the slope argument to geom_abline().

Choose your favorite among the predefined themes.

Hint: All start with theme_...(), but watch out for theme_set().
Apply theme(legend.position = "bottom") to a plot with a color or fill legend. What happens if you then apply theme_bw()? Why?

Convert one of the scatterplots you generated previously using the following pattern:

p <-
  data %>% 
  ___ %>%
  ggplot(aes(___)) +
    geom_point()

plotly::ggplotly(p)

Add extra aesthetics to the scatterplot. Hover with the mouse over the points:

p <-
  data %>% 
  ___ %>%
  ggplot(aes(___, extra1 = manufacturer, extra2 = model)) +
    geom_point()

plotly::ggplotly(p)

Convert a bar plot or a histogram to plotly. How does this affect the tooltip?
See https://plotly-book.cpsievert.me/linking-views-without-shiny.html for examples of linking two plots, or linking plots with other widgets. This requires the crosstalk package:
```
install.packages("crosstalk")
```

Show the quakes data, or a subset, on a map:

library(leaflet)
quakes %>% 
  ___ %>% 
  leaflet() %>% 
  addTiles() %>% 
  addCircles()

Add a popup to the tiles. Click on one of the circles

Hint: Use str_c() or paste0() to concatenate text and data.
```
library(leaflet)
___ %>% 
  addCircles()
```
Explore further options in ?addTiles.
See section 4.2.3 in https://plotly-book.cpsievert.me/linking-views-without-shiny.html for linking a map to a plot.