# Empirically Informed Random Trajectory Generation in 3-D

## Documentation for package ‘eRTG3D’ version 0.7.0

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

chiMaps | Chi maps of two variables
dem | Example digital elevation model (DEM)
dem2track.extent | Crops the DEM to the extent of the track with a buffer
dist2point.3d | Distance of each track point to a given point
dist2target.3d | Distance to target
eRTG3D | eRTG3D: Empirically Informed Random Trajectory Generator in 3-D
filter.dead.ends | Remove dead ends
get.densities.3d | Extract tldCube and autodifference approximation functions
get.glideRatio.3d | Calculate glide ratio
get.section.densities.3d | Extract tldCube and autodifferences functions from track sections
get.track.densities.3d | Extract tldCube and autodifferences functions from a consistent track
is.sf.3d | Tests if the object is a simple feature collection (class: "sf, data.frame")
lift2target.3d | Lift angle to target
logRasterStack | Converts a rasterStack to logarithmic scale
movingMedian | Moving median in one dimension
n.sim.cond.3d | Conditional Empirical Random Walks (CERW) in 3-D
n.sim.glidingSoaring.3d | Simulates multiple 'gliding & soaring' tracks with a given number of gliding steps
niclas | Example track data.frame
parpbapply | Parallel apply with progressbar
parpblapply | Parallel lapply with progressbar
parpbsapply | Parallel sapply with progressbar
plot2d | Plot function to plot the 3-D tracks in 2-D plane
plot3d | Plot track(s) with a surface of a digital elevation model in three dimensions
plot3d.densities | Density plots of turn angle, lift angle and step length
plot3d.multiplot | Multiple plot function for ggplot objects
plot3d.tldCube | Visualize turn-lift-step histogram
plotRaster | Plots a rasterLayer or rasterStack
qProb.3d | Q probabilities for n steps
reproduce.track.3d | Reproduce a track with the eRTG3D
saveImageSlices | Export a dataCube as image slice sequence
sf2df.3d | Converts a sf data.frame to a normal dataframe
sim.cond.3d | Conditional Empirical Random Walk (CERW) in 3-D
sim.crw.3d | Simulation of a three dimensional Correlated Random Walk
sim.glidingSoaring.3d | Simulates 'gliding & soaring' track with a given number of gliding steps
sim.uncond.3d | Unconditional Empirical Random Walk (UERW) in 3-D
test.eRTG.3d | Test the functionality of the eRTG3D
test.verification.3d | Statistical Verification of the simulated track
track.extent | Extent of track(s)
track.properties.3d | Track properties of a 3-D track
track.split.3d | This function splits the by outliers in the time lag.
track2sf.3d | Converts a track to a "sf, data.frame"
transformCRS.3d | Transform coordinates reference system (CRS) of a 3-D track
turn2target.3d | Turn angle to target
turnLiftStepHist | Three dimensional histogram
voxelCount | Apply voxel counting on a point cloud