df2move: Convert a data.frame into a move or moveStack object

In moveVis: Movement Data Visualization

Description

This function is a simple wrapper that converts a data.frame into a move or moveStack object. Both can be used as inputs to frames_spatial or frames_graph.

Usage

df2move(df, proj, x, y, time, track_id = NULL, data = NULL, ...)

Arguments

df	data.frame, a data.frame with rows representing observations and columns representing x and y coordinates, time and optionally track IDs, if multiple tracks are contained.
proj	projection, character (proj4string) or CRS object, indicating the projection that the coordinates of df represent.
x	character, name of the column in df that represents x coordinates.
y	character, name of the column in df that represents y coordinates.
time	character, name of the column in df that represents timestamps. Timestamps need to be of class POSIXct.
track_id	character, optional, name of the column in df that represents track names or IDs. If set, a moveStack is returned, otherwise, a move object is returned.
data	data.frame, optional, to add additional data such as path colours (see move). Number of rows must equal number of rows of df.
...	additional arguments passed to move.

Value

A move or moveStack object.

See Also

frames_spatial frames_graph subset_move

Examples

library(moveVis)
library(move)

# load the example data and convert them into a data.frame
data("move_data")
move_df <- methods::as(move_data, "data.frame")

# use df2move to convert the data.frame into a moveStack
df2move(move_df,
        proj = "+init=epsg:4326 +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0", 
        x = "coords.x1", y = "coords.x2", time = "timestamps", track_id = "trackId")

moveVis documentation built on March 31, 2020, 5:08 p.m.