Exploring Spatial Data
The data slot in shp
holds a data frame like we are used to working with. However, since it is stored inside a SpatialPolygonsDataFrame, we access the data frame a little differently using the @
operator.
glimpse(shp@data)
Observations: 808
Variables: 2
$ GEOID10 <fct> 27925, 28754, 28092...
$ ALAND10 <fct> 624688620, 223734670, 317180853 ...
Our data frame has 808 observations of two variables:
- GEOID10: the zip code of each polygon
- ALAND10: the area (square meters) of each polygon
This exercise is part of the course
Interactive Maps with leaflet in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Glimpse the data slot of shp
glimpse(shp___data)