trim_lines_at

last operation for isochrone calculation, cutting the lines at
their begining and ending. This is a worker function for calc_isochrones.

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

trim_lines_at function

<dl><dt>df1</dt>
<dd>A features collection of linestrings with some specific fields.</dd>
<dt>graph_result</dt>
<dd>A list produced by the functions build_graph_directed or build_graph.</dd>
<dt>d</dt>
<dd>the end distance of this isochrones.</dd>
<dt>dd</dt>
<dd>the start distance of this isochrones.</dd>
<dt>i</dt>
<dd>the actual iteration.</dd>
<dt>donught</dt>
<dd>A boolean indicating if the returned isochrone will be plained or a donught.</dd></dl>

Arguments

Helper for isochrones lines cutting — trim_lines_at

<dl>

<dt>df1</dt>
<dd>A features collection of linestrings with some specific fields.</dd>


<dt>graph_result</dt>
<dd>A list produced by the functions build_graph_directed or build_graph.</dd>


<dt>d</dt>
<dd>the end distance of this isochrones.</dd>


<dt>dd</dt>
<dd>the start distance of this isochrones.</dd>


<dt>i</dt>
<dd>the actual iteration.</dd>


<dt>donught</dt>
<dd>A boolean indicating if the returned isochrone will be plained or a donught.</dd>

</dl>

trim_lines_at: Helper for isochrones lines cutting

Description

Usage

Value

Arguments