The data for this map is taken from the Sacramento real estate transactions over a 5 day period. Source: https://support.spatialkey.com/spatialkey-sample-csv-data/
data <- "http://samplecsvs.s3.amazonaws.com/Sacramentorealestatetransactions.csv"
df <- read.csv(url(data))
df <- df[sample(nrow(df), 500), c(11,12)]
The map displays clusters of Sacramento real estate transactions.
library(leaflet)
df %>%
leaflet() %>%
addTiles() %>%
addMarkers(clusterOptions = markerClusterOptions())