ess_kernel

The worker function to perform the simple nkde.

internal

Perform spatial analysis on network.
Implement several methods for spatial analysis on network: Network Kernel Density estimation,
building of spatial matrices based on network distance ('listw' objects from 'spdep' package), K functions estimation
for point pattern analysis on network, k nearest neighbours on network, reachable area calculation, and graph generation
References: Okabe et al (2019) <doi:10.1080/13658810802475491>;
Okabe et al (2012, ISBN:978-0470770818);Baddeley et al (2015, ISBN:9781482210200).

Jeremy Gelb

spNetwork

Spatial Analysis on Network

Philippe Apparicio

ess_kernel function

<dl><dt>graph</dt>
<dd>a graph object from igraph representing the network</dd>
<dt>y</dt>
<dd>the index of the actual event</dd>
<dt>bw</dt>
<dd>a float indicating the kernel bandwidth (in meters)</dd>
<dt>kernel_func</dt>
<dd>a function obtained with the function select_kernel</dd>
<dt>ok_samples</dt>
<dd>a a feature collection of points representing the sampling points. The
samples must be snapped on the network. A column edge_id must indicate for
each sample on which edge it is snapped.</dd>
<dt>nodes</dt>
<dd>a a feature collection of points representing the nodes of the network</dd>
<dt>ok_edges</dt>
<dd>a a feature collection of linestrings representing the edges of the network</dd></dl>

Arguments

Worker for simple NKDE algorithm — ess_kernel

<dl>

<dt>graph</dt>
<dd>a graph object from igraph representing the network</dd>


<dt>y</dt>
<dd>the index of the actual event</dd>


<dt>bw</dt>
<dd>a float indicating the kernel bandwidth (in meters)</dd>


<dt>kernel_func</dt>
<dd>a function obtained with the function select_kernel</dd>


<dt>ok_samples</dt>
<dd>a a feature collection of points representing the sampling points. The
samples must be snapped on the network. A column edge_id must indicate for
each sample on which edge it is snapped.</dd>


<dt>nodes</dt>
<dd>a a feature collection of points representing the nodes of the network</dd>


<dt>ok_edges</dt>
<dd>a a feature collection of linestrings representing the edges of the network</dd>

</dl>

ess_kernel: Worker for simple NKDE algorithm

Description

Usage

Arguments

Examples