Adding points to a map

The maps created using plot_geo() are still plotly objects, so you can add additional layers as before. In this exercise, you will add points to a United States map representing the locations where President Trump held rallies for the 2018 midterm election. The dataset rallies2018 contains the date, city, state, latitude, longitude, and number of number of people who spoke.

Note that plotly has already been loaded for you.

This exercise is part of the course

Interactive Data Visualization with plotly in R

View Course

Exercise instructions

Use add_markers() to add points representing the rallies to the U.S. map. Be sure to map long to the x-axis, lat to the y-axis, and no.speakers to the size of the points.
Add the title "2018 Trump Rallies".
Restrict the scope of the map to the 'usa'.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Map President Trump's rallies in 2018
rallies2018 %>%
  plot_geo(locationmode = 'USA-states') %>%
  ___(
    ___, ___, ___,  
    hoverinfo = "text", text = ~paste(city, state, sep = ",")
  ) %>%
  ___(___ = ___, 
      geo = ___(___ = ___))

Edit and Run Code