sf plots with plot()
As you have seen, sf objects can be plotted using the base R plot() function. The first plot will allow you to set up the base for the map, and subsequent layers can be added using plot().
In the following, there are four sf objects stored as:
london_polylondon_looplondon_capitalnum_listings
Complete the code below to obtain a geospatial map using plot() to piece sf objects together. Use st_geometry() to ensure that all objects are indeed sf objects when plotted.
The sf and tidyverse libraries have been loaded.
This exercise is part of the course
Building Dashboards with shinydashboard
Exercise instructions
- Plot the first layer which is a multipolygon called
london_poly. - Plot
london_loopand color it purple. - Plot
london_capitaland color it green. - Add red markers for each point in
num_listings.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Plot the first layer which is a multipolygon
___(___(london_poly),
col = sf.colors(length(london_poly$Name),
categorical = TRUE),
axes=TRUE, border=grey(0.2, 0.5))
# Plot london_loop and color it purple
___(___(london_loop), add=___, col=___)
# Plot london_capital and color it green
___
# Add red markers for each point in num_listings
___