1 Multiple Choice Question

Why do we need visualization?

1. We can communicate visual artifacts with aspect ratio.
2. We can reduce cognitive load through visualization.
3. Anscombe’s Quartet dataset provides rationals on why we always visualize a dataset.
4. Because we have three different visual systems(Base, ggplot, lattice) in R, we need a visualization.

Hint: 데이터 과학 - “시각화 (Visualization) 개요”

2 Parsons Problems

library(____)

## list-column dataset
gapminder_nest <- gapminder %>% 
  filter(continent == "Americas") %>% 
  group_by(continent, country) %>% 
  ____()

## plotly graph function
lifeExp_plot <- function(df) {
    ____(df, x = ~year, y = ~lifeExp) %>% 
    add_markers() %>% 
    add_lines()
}

## Generate trelliscopeJS interactive graph 
gapminder_plot_df <- gapminder_nest %>% 
  mutate(panel = map_plot(data, ____))

trelliscope(____,
            name = "gapminder", nrow = 2, ncol = 3)