Chapter 18 Class assignment 4

Let’s create a visualization of the association between two continuous variables. Along the way we’ll add some colours, transform axes, and change some scales.

  1. Load data set & packages For this visualization we’ll make use of the movies dataset. We’ll have to install and load the package ggplot2movies first. See here for an explanation of the dataset.
# install.packages("ggplot2movies")
library(tidyverse)
library(ggplot2movies)
movies <- movies %>% filter(budget > 100) # remove movies with implausible low budgets
  1. Get a quick overview of the dataset by running:
head(movies) # print first couple of rows of dataset
## # A tibble: 6 × 24
##   title      year length budget rating votes    r1    r2    r3    r4    r5    r6
##   <chr>     <int>  <int>  <int>  <dbl> <int> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
## 1 'G' Men    1935     85 4.50e5    7.2   281   0     4.5   4.5   4.5   4.5  14.5
## 2 'Manos' …  1966     74 1.9 e4    1.6  7996  74.5   4.5   4.5   4.5   4.5   4.5
## 3 'Til The…  1997    113 2.3 e7    4.8   799   4.5   4.5   4.5  14.5  14.5  14.5
## 4 .com for…  2002     96 5   e6    3.7   271  64.5   4.5   4.5   4.5   4.5   4.5
## 5 10 Thing…  1999     97 1.6 e7    6.7 19095   4.5   4.5   4.5   4.5   4.5  14.5
## 6 100 Mile…  2002     98 1.10e6    5.6   181   4.5   4.5   4.5   4.5  14.5  24.5
## # ℹ 12 more variables: r7 <dbl>, r8 <dbl>, r9 <dbl>, r10 <dbl>, mpaa <chr>,
## #   Action <int>, Animation <int>, Comedy <int>, Drama <int>,
## #   Documentary <int>, Romance <int>, Short <int>

  1. Create a scatter-plot in which you show the relationship between the budget of the movie (on the x-axis) and the rating (y-axis).

  2. Recreate the graph, but perform a 10log transformation on the x-axis.

  3. Add sensible breaks and labels to the x- and y-axis

  4. Recreate the above graph, but now using geom_hex

  5. Under the hood, geom_hex is creating a fill-colour, something we can change with scale_fill_gradient. Do so.

  6. In the variable Action is described whether the movie is categorized as an action movie. Create facets using this variable.

  7. Add a linear regression line.