Linking two charts

Intermediate Interactive Data Visualization with plotly in R

Adam Loy

Statistician, Carleton College

Exploring clusters

Exploring longitudinal data

Crosstalk

Enables linked plots via JavaScript
Creates static HTML files that you can easily host
Displays in the RStudio viewer pane

2014 world indicators

world2014

# A tibble: 193 x 11
  country  year income   co2 military population  urban life_expectancy four_regions
  <chr>   <dbl>  <dbl> <dbl>    <dbl>      <dbl>  <dbl>           <dbl> <chr>       
1 Afghan…  2014   1780 0.299     1.3    32800000 8.05e6            57.8 asia        
2 Albania  2014  10700 1.96      1.35    2920000 1.63e6            77.4 europe      
3 Algeria  2014  13500 3.72      5.55   39100000 2.75e7            77.1 africa      
4 Andorra  2014  44900 5.83     NA         79200 7.01e4            82.6 europe      
5 Angola   2014   6260 1.29      4.7    26900000 1.69e7            63.3 africa      
6 Antigu…  2014  19500 5.38     NA         98900 2.49e4            77.1 americas    
# … with 187 more rows, and 2 more variables: eight_regions <chr>, six_regions <chr>

Separate views

p1 <- world2014 %>% plot_ly(x = ~income, y = ~co2) %>% add_markers()
p2 <- world2014 %>% plot_ly(x = ~military, y = ~co2) %>% add_markers()
subplot(p1, p2, titleX = TRUE, titleY = TRUE) %>% 
  hide_legend()

Linked views

library(crosstalk)
shared_data <- SharedData$new(world2014)

p1 <- shared_data %>% 
  plot_ly(x = ~income, y = ~co2) %>% 
  add_markers()
p2 <- shared_data %>% 
  plot_ly(x = ~military, y = ~co2) %>% 
  add_markers()

subplot(p1, p2, titleX = TRUE, titleY = TRUE) %>% 
  hide_legend()

Linked brushing

Enable linked brushing via highlight()

subplot(p1, p2, titleX = TRUE, titleY = TRUE) %>% 
  hide_legend() %>%
  highlight(on = "plotly_selected")

Let's practice!

Intermediate Interactive Data Visualization with plotly in R