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Tag

Core functions related to a tag object.

tag_create()
Create a tag object
tag_set_map()
Configure the map of a tag object
tag_update()
Update a tag object

Visualize tag

Print and plot a tag object.

print(<tag>)
Print a tag object
plot(<tag>)
Plot a tag object
plot_tag_pressure()
Plot pressure data of a tag
plot_tag_light()
Plot light data of a tag
plot_tag_twilight()
Plot twilight data of a tag
plot_tag_acceleration()
Plot acceleration data of a tag
plot_tag_temperature()
Plot temperature data of a tag

Label tag

Core functions related to labelling a tag object.

tag_label()
Label a tag object
tag_label_auto()
Automatic labelling of a tag
tag_label_write()
Write a tag label file
tag_label_read()
Read a tag label file
tag_label_stap()
Create stationary periods from a tag label

Tag utilities

Various utility functions related to a tag object.

tag_assert()
Assert the status of a tag
tag2path()
Extract a path from a tag
tag2map()
Extract a map from a tag

GeoPressure

Core functions of the GeoPressureAPI.

GeoPressure map

Geopositioning based on pressure data.

geopressure_map() geopressure_map_likelihood() geopressure_map_mismatch()
Compute likelihood map from pressure data
geopressure_map_preprocess()
Prepare pressure data for geopositioning

GeoPressure time series

Retrieving time series pressure at a given location.

geopressure_timeseries()
Request and download pressure time series at a given location

GeoLight

Geopositioning based on light data.

geolight_map()
Compute likelihood map from twilight
twilight_create()
Estimate twilight from light data
twilight_label_write()
Write a twilight label file
twilight_label_read()
Read a twilight label file
light2mat()
Format light data into a matrix

Graph

Constructing the Hidden-Markov model with a graph and computing trajectory products.

graph_create()
Create a graph object

Graph movement

Defining the movement model, optionally using wind data and bird morphology.

graph_set_movement()
Define the movement model of a graph
graph_transition()
Compute transition probabilities of a graph
tag_download_wind()
Download flight data
graph_add_wind()
Compute windspeed and airspeed on a graph
bird_create()
Create bird flight traits
print(<bird>)
Print a bird object
speed2prob()
Compute probability of a bird speed
edge_add_wind()
Retrieve ERA5 variable along edge
plot_graph_movement()
Plot movement model of a graph

Graph products

Compute the three main products of the Hidden-Markov model.

graph_most_likely()
Compute the most likely trajectory
graph_marginal()
Compute marginal probability map
graph_simulation()
Simulate randomly multiple trajectories

Graph utilities

Utility functions for a graph object

graph_assert()
Assert the status of a graph
print(<graph>)
Print a graph object

Map

Container for spatio-temporal (stationary periods) data.

map_create()
Create a map object
print(<map>)
Print a map object
plot(<map>)
Plot a map object
rast.map()
Construct a SpatRaster from a map
map_expand()
Construct grid from extent and scale

Path

Data.frame of positions defining a bird trajectory.

ind2path()
Create a path from indices of coordinates
path2edge()
Extract the edges of a path from a graph
plot_path()
Plot a path

Pressurepath

Data.frame of pressure time series along a path.

pressurepath_create()
Create a pressurepath
pressurepath_update()
Update a pressurepath
plot_pressurepath()
Plot a pressurepath
path2elevation()
Download ground elevation along a path

GeoPressureTemplate

Wrapper functions for the full GeoPressureR worflow

Param

List of parameters used in tag and graph.

param_create()
Create a param list
print(<param>)
Print a param list

Utilities

General utility functions of the package.

stap2flight()
Compute flights from stationary periods
stap2duration()
Compute duration of stationary periods
speed2bearing()
Compute the bearing of a speed
windsupport()
Compute wind support and drift
path2twilight()
Compute astronomical twilight from positions and dates
geopressureviz()
Start the GeoPressureViz shiny app
GeoPressureR
GeoPressureR: Global positioning by atmospheric pressure.