vmf.kerncontour2

This function calculates the Von Mises-Fisher kernel density estimator is a slight modification of function vmf.kerncontour
in <code>Directional</code> package. In this new version, it is possible to provide a numerical value for the bandwidth.

internal

We provide an R tool for computation and nonparametric plug-in estimation of Highest Density Regions (HDRs) and general level sets in the directional setting. Concretely, circular and spherical HDRs can be reconstructed from a data sample following Saavedra-Nieves and Crujeiras (2021) <doi:10.1007/s11634-021-00457-4>. This library also contains two real datasets in the circular and spherical settings. The first one concerns a problem from animal orientation studies and the second one is related to earthquakes occurrences.

Paula Saavedra-Nieves

HDiR

Directional Highest Density Regions

Rosa M Crujeiras

Andrés Prieto

Felicita Scapini

vmf.kerncontour2 function

<dl> <dt>u</dt>
<dd>A two column matrix. The first column is the latitude and the second is the longitude.</dd> <dt>h</dt>
<dd>Numeric value for bandwidth ot smoothing parameter.</dd> <dt>full</dt>
<dd>If <code>FALSE</code> (default), uses the range of positions from <code>u</code> to calculate and optionally plot densities. If <code>TRUE</code>, calculates densities covering the entire sphere.</dd> <dt>ngrid</dt>
<dd>Sets the resolution of the density calculation.</dd></dl>

Arguments

Paula Saavedra-Nieves and Rosa M. Crujeiras.

Author

Von Mises-Fisher kernel density estimator with numerical smoothing parameter — vmf.kerncontour2

<dl>

 <dt>u</dt>
<dd>A two column matrix. The first column is the latitude and the second is the longitude.</dd>

 <dt>h</dt>
<dd>Numeric value for bandwidth ot smoothing parameter.</dd>

 <dt>full</dt>
<dd>If <code>FALSE</code> (default), uses the range of positions from <code>u</code> to calculate and optionally plot densities. If <code>TRUE</code>, calculates densities covering the entire sphere.</dd>

 <dt>ngrid</dt>
<dd>Sets the resolution of the density calculation.</dd>

</dl>

vmf.kerncontour2: Von Mises-Fisher kernel density estimator with numerical smoothing parameter

Description

Usage

Value

Arguments

Author