add_markers {evolMap}

Add markers.

Description

Add markers to the interactive map.

Usage

add_markers(map, data, latitude = NULL, longitude = NULL, name = NULL,
  label = NULL, image = NULL, color = NULL, shape = NULL, text = NULL,
  info = NULL, infoFrame = c("right","left"),
  start = NULL, end = NULL, period = NULL,
  markerCluster = FALSE, roundedIcons = TRUE, jitteredPoints = 0)

Arguments

map

an object of class evolMap.

data

a marker data frame with the locations and information to show in each marker. Its column names can be passed as parameters to the arguments of the function.

latitude

name of the column with the latitude coordinates for each marker (first column by default).

longitude

name of the column with the longitude coordinates for each marker (second column by default).

name

name of the column with names in the marker data frame.

label

name of the column with labels in the marker data frame.

image

name of the column with the path to marker image files in the marker data frame.

color

name of the column with color variable in the marker data frame.

shape

name of the column with shape variable in the marker data frame.

text

name of the column with texts in the marker data frame. This information will be shown as a popup.

info

name of the column with information to display in a panel in the marker data frame.

infoFrame

Panel (right or left) where the information is to be displayed The left panel is only available if a description is provided with add_description.

start

name of the column with the start time of a period in the marker data frame.

end

name of the column with the end time of a period in the marker data frame.

period

name of the column with the period name in the marker data frame.

markerCluster

enable joining of nearby markers when zooming out.

roundedIcons

display markers with rounded borders.

jitteredPoints

add an amount of noise to markers to avoid overlapping.

Value

Object of class evolMap.

Author(s)

Modesto Escobar [e-mail], Department of Sociology and Communication, University of Salamanca, Carlos Prieto [e-mail], and David Barrios [e-mail], Bioinformatics Service, University of Salamanca.

Examples

# load data
data(sociologists)
data(locations)

# load pictures
sociologists$picture <- system.file("extdata", sociologists$picture,
  package="evolMap")

# join locations
sociologists$latitude <- locations[,1]
sociologists$longitude <- locations[,2]

# create map
map <- create_map()
map <- add_markers(map, sociologists,
  latitude = "latitude", longitude = "longitude",
  label = "label", image = "picture",
  start = "birth", end = "death")


# plot map
plot(map)