set_B_directionality

Calculates average upstream/downstream or combined distance between each couple of reaches

internal

Indices for assessing riverscape fragmentation, including the Dendritic Connectivity Index, the Population Connectivity Index, the River Fragmentation Index, the Probability of Connectivity, and the Integral Index of connectivity. For a review, see Jumani et al. (2020) <doi:10.1088/1748-9326/abcb37> and Baldan et al. (2022) <doi:10.1016/j.envsoft.2022.105470> Functions to calculate temporal indices improvement when fragmentation due to barriers is reduced are also included.

Baldan D.

riverconn

Fragmentation and Connectivity Indices for Riverscapes

Damiano Baldan

David Cunillera-Montcusi

Andrea Funk

set_B_directionality function

<dl><dt>graph</dt>
<dd>an object of class igraph. Can be both directed or undirected.</dd>
<dt>dir_distance_type</dt>
<dd>how directionality in B_ij calculations is dealt with:
<code>"symmetric"</code> (i.e. undirected graph) or <code>"asymmetric"</code> (i.e. directed graph). See details.</dd>
<dt>field_B</dt>
<dd>the 'graph' edge attribute to be used to calculate the distance. Default is <code>"length"</code>.</dd></dl>

Arguments

Calculates average upstream/downstream or combined distance between each couple of reaches — set_B_directionality

<dl>

<dt>graph</dt>
<dd>an object of class igraph. Can be both directed or undirected.</dd>


<dt>dir_distance_type</dt>
<dd>how directionality in B_ij calculations is dealt with:
<code>"symmetric"</code> (i.e. undirected graph) or <code>"asymmetric"</code> (i.e. directed graph). See details.</dd>


<dt>field_B</dt>
<dd>the 'graph' edge attribute to be used to calculate the distance. Default is <code>"length"</code>.</dd>

</dl>

set_B_directionality: Calculates average upstream/downstream or combined distance between each couple of reaches

Description

Usage

Value

Arguments