leaflet.extras2: addHexbin – R documentation

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addHexbin

Add a Hexbin layer

Description

Create dynamic hexbin-based heatmaps on Leaflet maps. This plugin leverages the data-binding power of d3 to allow you to dynamically update the data and visualize the transitions.

Usage

addHexbin(
  map,
  lng = NULL,
  lat = NULL,
  radius = 20,
  layerId = NULL,
  group = NULL,
  opacity = 0.5,
  options = hexbinOptions(),
  data = getMapData(map)
)

Arguments

`map`	a map widget object created from `leaflet()`
`lng`	a numeric vector of longitudes, or a one-sided formula of the form `~x` where `x` is a variable in `data`; by default (if not explicitly provided), it will be automatically inferred from `data` by looking for a column named `lng`, `long`, or `longitude` (case-insensitively)
`lat`	a vector of latitudes or a formula (similar to the `lng` argument; the names `lat` and `latitude` are used when guessing the latitude column from `data`)
`radius`	Radius of the hexbin layer
`layerId`	the layer id
`group`	the name of the group the newly created layers should belong to (for `clearGroup` and `addLayersControl` purposes). Human-friendly group names are permitted–they need not be short, identifier-style names. Any number of layers and even different types of layers (e.g. markers and polygons) can share the same group name.
`opacity`	Opacity of the hexbin layer
`options`	List of further options. See `hexbinOptions`
`data`	the data object from which the argument values are derived; by default, it is the `data` object provided to `leaflet()` initially, but can be overridden

Value

the new map object

Note

Currently doesn't respect layerId nor group.

References

https://github.com/Asymmetrik/leaflet-d3#hexbins-api

Examples

library(leaflet)
library(leaflet.extras2)

n <- 1000
df <- data.frame(lat = rnorm(n, 42.0285, .01),
                 lng = rnorm(n, -93.65, .01))

leaflet()  %>%
  addTiles() %>%
  addHexbin(lng = df$lng, lat = df$lat,
            options = hexbinOptions(
               colorRange = c("red", "yellow", "blue"),
               radiusRange = c(10, 20)
           ))

leaflet.extras2

Extra Functionality for 'leaflet' Package

v1.1.0

GPL-3 | file LICENSE

Authors

Gatscha Sebastian [aut, cre]

Initial release