simple_tnkde: Simple TNKDE algorithm

In spNetwork: Spatial Analysis on Network

Simple TNKDE algorithm

Description

Function to perform the simple tnkde.

Usage

simple_tnkde(
  graph,
  events,
  samples,
  samples_time,
  bws_net,
  bws_time,
  kernel_func,
  nodes,
  edges,
  div
)

Arguments

graph	a graph object from igraph representing the network
events	a feature collection of points representing the events. It must be snapped on the network, and be nodes of the network. A column vertex_id must indicate for each event its corresponding node
samples	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.
samples_time	a numeric vector indicating when the densities must be sampled
bws_net	a vector indicating the network kernel bandwidth (in meters) for each event
bws_time	a vector indicating the time kernel bandwidth for each event
kernel_func	a function obtained with the function select_kernel
nodes	a feature collection of points representing the nodes of the network
edges	a feature collection of linestrings representing the edges of the network
div	The divisor to use for the kernel. Must be "n" (the number of events within the radius around each sampling point), "bw" (the bandwidth) "none" (the simple sum).

Value

a list of two matrices. The first one ins the matrix of the densities, the rows are the samples and the columns the time. The second has the same dimensions and contains the number of events influencing each sample

Examples

#This is an internal function, no example provided

spNetwork documentation built on Aug. 24, 2023, 5:10 p.m.