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  3. Interactive Maps with leaflet in R

Exercise

Adding a Piece of Flair

Earlier in this chapter, we used addSearchOSM() to find the middle of the US. To search for markers, rather than locations, we can use the addSearchFeatures() function. addSearchFeatures() will add a search box that you can use to find markers in the group(s) passed to the targetGroups argument. For example, to search our map for public colleges we could use the following code. 

m4  %>% 
  addSearchFeatures(
    targetGroups = 'Public',
    options = searchFeaturesOptions(zoom = 10))

The m4 map and the leaflet.extras package have been loaded for you.

Instructions

100 XP
  • Use the addSearchFeatures() function to make colleges in all sectors searchable.
  • Set the search zoom level to 18.