slice: Location Density Estimates

In SWotherspoon/SGAT: Solar/Satellite Geolocation for Animal Tracking

Location Density Estimates

Description

Generate density estimates for time slices of a trip

Usage

slice(
  slices,
  k,
  mcmc = slices$mcmc,
  grid = slices$grid,
  weights = slices$weights,
  method = slices$method,
  bandwidth = slices$bandwidth,
  chains = NULL
)

slices(
  type = c("primary", "intermediate"),
  breaks = NULL,
  mcmc = NULL,
  grid = raster(),
  weights = NULL,
  method = c("hist", "kde"),
  bandwidth = 0,
  include.lowest = TRUE,
  right = FALSE
)

sliceInterval(slices, k, mcmc = slices$mcmc)

sliceIndices(slices, mcmc = slices$mcmc)

Arguments

slices	an object generated by slices
k	the index of the time slice to bin.
mcmc	object generated by generated by estelleMetropolis or stellaMetropolis.
grid	raster object that defines the sampling grid.
weights	weights for each location.
method	return a kernel density estimate ("kde") or simple histogram ("hist")?
bandwidth	bandwidth of the kernel density estimator.
chains	NULL or the subset of chains to bin.
type	construct density rasters for primary (x) or intermediate (z) locations
breaks	NULL, or a specification suitable for cut.POSIXt to define the time slices to bin.
include.lowest	parameter to cut.POSIXt.
right	parameter to cut.POSIXt.

Details

These functions divide a trip into time slices, and generate location density estimates for each time slice.

The slices function defines the slices into which the trip is divided, and whether density estimates are generated for the primary or intermediate locations. If breaks is NULL, each location forms a separate time slice, otherwise breaks divides the trip into time slices in the same style as cut.POSIXt. A default set of samples and a raster defining the spatial grid may also be specified.

The slice function generates a density estimate for a time slice, sliceInterval returns the corresponding time interval, and sliceIndices returns the indices that will yield non null raster.

Value

slice returns the locations for time slice of the track binned into a raster, slices returns a slices object that defines the time slices into which to bin, sliceInterval returns the time interval spanned by a slice, and sliceIndices returns the valid set of indices that will yield a raster.

SWotherspoon/SGAT documentation built on June 1, 2022, 10:49 p.m.