compute_distance_matrix

<code>compute_distance_matrix()</code> is a small helper function to help you compute a distance matrix.
For the geographically method to work, is is important that distances between points are not zero. This function allows to add a small random noise to avoid zero distances.

Performs geographically weighted Lasso regressions. Find optimal bandwidth, fit a geographically weighted lasso or ridge regression, and make predictions.
These methods are specially well suited for ecological inferences. Bandwidth selection algorithm is from A. Comber and P. Harris (2018) <doi:10.1007/s10109-018-0280-7>.

Matthieu Mulot

GWlasso

Geographically Weighted Lasso

Sophie Erb

compute_distance_matrix function

<dl><dt>data</dt>
<dd>A dataframe or matrix containing at least two numerical columns.</dd>
<dt>method</dt>
<dd>method to compute the distance matrix. Ultimately passed to <code><a href="/link/stats%3A%3Adist()?package=GWlasso&version=1.0.1" data-mini-rdoc="GWlasso::stats::dist()">stats::dist()</a></code>. Can be <code>euclidean</code>, <code>maximum</code>, <code>manhattan</code>, <code>canberra</code>, <code>binary</code> or <code>minkowski</code>.</dd>
<dt>add.noise</dt>
<dd>TRUE/FALSE set to TRUE to add a small noise to the distance matrix. Noise \(U\) is generated as \( U \sim (1\times 10^{-6}, 5\times 10^{-6})\).
Noise is added only for pairs for which distance is zero.</dd></dl>

Arguments

Compute distance matrix — compute_distance_matrix

<dl>

<dt>data</dt>
<dd>A dataframe or matrix containing at least two numerical columns.</dd>


<dt>method</dt>
<dd>method to compute the distance matrix. Ultimately passed to <code><a href='https://rdrr.io/r/stats/dist.html'>stats::dist()</a></code>. Can be <code>euclidean</code>, <code>maximum</code>, <code>manhattan</code>, <code>canberra</code>, <code>binary</code> or <code>minkowski</code>.</dd>


<dt>add.noise</dt>
<dd>TRUE/FALSE set to TRUE to add a small noise to the distance matrix. Noise \(U\) is generated as \( U \sim (1\times 10^{-6}, 5\times 10^{-6})\).
Noise is added only for pairs for which distance is zero.</dd>

</dl>

compute_distance_matrix: Compute distance matrix

Description

Usage

Value

Arguments

Examples