is.metric

Checks whether the input dissimilarity matrix is metric (i.e. all triplets fulfill the triangle inequality).

Analysis of temporal changes (i.e. dynamics) of ecological entities, defined as trajectories on a chosen multivariate space, by providing a set of
trajectory metrics and visual representations [De Caceres et al. (2019) <doi:10.1002/ecm.1350>;
and Sturbois et al. (2021) <doi:10.1016/j.ecolmodel.2020.109400>]. Includes functions
to estimate metrics for individual trajectories (length, directionality, angles, ...) as well as
metrics to relate pairs of trajectories (dissimilarity and convergence). Functions are also
provided to estimate the ecological quality of ecosystem with respect to reference conditions
[Sturbois et al. (2023) <doi:10.1002/ecs2.4726>].

Miquel Caceres

ecotraj

Ecological Trajectory Analysis

Miquel De Cáceres

Nicolas Djeghri

Anthony Sturbois

Javier De la Casa

is.metric function

<dl><dt>x</dt>
<dd>Either an object of class <code>trajectories</code>, a symmetric <code><a href="/link/matrix?package=ecotraj&version=1.1.1" data-mini-rdoc="ecotraj::matrix">matrix</a></code> or an object of class <code><a href="/link/dist?package=ecotraj&version=1.1.1" data-mini-rdoc="ecotraj::dist">dist</a></code> containing the distance values between pairs of ecological states.</dd>
<dt>tol</dt>
<dd>Tolerance value for metricity</dd></dl>

Arguments

Author

Metricity — is.metric

<dl>

<dt>x</dt>
<dd>Either an object of class <code>trajectories</code>, a symmetric <code><a href='https://rdrr.io/r/base/matrix.html'>matrix</a></code> or an object of class <code><a href='https://rdrr.io/r/stats/dist.html'>dist</a></code> containing the distance values between pairs of ecological states.</dd>


<dt>tol</dt>
<dd>Tolerance value for metricity</dd>

</dl>

is.metric: Metricity

Description

Usage

Value

Arguments

Author