googleway (version 2.0.0)

add_markers: Add markers

Description

Add markers to a google map

Usage

add_markers(map, data = get_map_data(map), id = NULL, colour = NULL,
  lat = NULL, lon = NULL, title = NULL, draggable = NULL,
  opacity = NULL, label = NULL, cluster = FALSE, info_window = NULL,
  mouse_over = NULL, mouse_over_group = NULL, layer_id = NULL)

Arguments

map

a googleway map object created from google_map()

data

data frame containing at least two columns, one specifying the latitude coordinates, and the other specifying the longitude. If Null, the data passed into google_map() will be used.

id

string specifying the column containing an identifier for a marker

colour

string specifying the column containing the 'colour' to use for the markers. One of 'red', 'blue', 'green' or 'lavender'.

lat

string specifying the column of data containing the 'latitude' coordinates. If left NULL, a best-guess will be made

lon

string specifying the column of data containing the 'longitude' coordinates. If left NULL, a best-guess will be made

title

string specifying the column of data containing the 'title' of the markers. The title is displayed when you hover over a marker. If blank, no title will be displayed for the markers.

draggable

string specifying the column of data defining if the marker is 'draggable' (either TRUE or FALSE)

opacity

string specifying the column of data defining the 'opacity' of the maker. Values must be between 0 and 1 (inclusive).

label

string specifying the column of data defining the character to appear in the centre of the marker. Values will be coerced to strings, and only the first character will be used.

cluster

logical indicating if co-located markers should be clustered when the map zoomed out

info_window

string specifying the column of data to display in an info window when a marker is clicked

mouse_over

string specifying the column of data to display when the mouse rolls over the marker

mouse_over_group

string specifying the column of data specifying which groups of circles to highlight on mouseover

layer_id

single value specifying an id for the layer.

Examples

# NOT RUN {
df <- structure(list(lat = c(-37.8201904296875, -37.8197288513184,
-37.8191299438477, -37.8187675476074, -37.8186187744141, -37.8181076049805
), lon = c(144.968612670898, 144.968414306641, 144.968139648438,
144.967971801758, 144.967864990234, 144.967636108398), weight = c(31.5698964400217,
97.1629025738221, 58.9051092562731, 76.3215389118996, 37.8982300488278,
77.1501972114202), opacity = c(0.2, 0.2, 0.2, 0.2, 0.2, 0.2)), .Names = c("lat",
"lon", "weight", "opacity"), row.names = 379:384, class = "data.frame")

google_map(key = map_key, data = df) %>%
 add_markers(lat = "lat", lon = "lon", info_window = "weight")

# }