.calcWeights

Calculates weighting for a model. Each record receives a numeric weight.

internal

Implements species distribution modeling and ecological niche
modeling, including: bias correction, spatial cross-validation, model
evaluation, raster interpolation, biotic "velocity" (speed and
direction of movement of a "mass" represented by a raster), interpolating
across a time series of rasters, and use of spatially imprecise records.
The heart of the package is a set of "training" functions which
automatically optimize model complexity based number of available
occurrences. These algorithms include MaxEnt, MaxNet, boosted regression
trees/gradient boosting machines, generalized additive models,
generalized linear models, natural splines, and random forests. To enhance
interoperability with other modeling packages, no new classes are created.
The package works with 'PROJ6' geodetic objects and coordinate reference
systems.

Adam B. Smith

enmSdmX

Species Distribution Modeling and Ecological Niche Modeling

.calcWeights function

<dl><dt>w</dt>
<dd>Either logical in which case <code>TRUE</code> (default) causes the total weight of presences to equal the total weight of absences (if <code>family='binomial'</code>) or a numeric vector of weights, one per row in <code>data</code> or the name of the column in <code>data</code> that contains site weights. If <code>FALSE</code>, then each datum gets a weight of 1.</dd>
<dt>data</dt>
<dd>Data frame</dd>
<dt>resp</dt>
<dd>Name of response column</dd>
<dt>family</dt>
<dd>Name of family</dd></dl>

Arguments

Calculate weights for a model — .calcWeights

<dl>

<dt>w</dt>
<dd>Either logical in which case <code>TRUE</code> (default) causes the total weight of presences to equal the total weight of absences (if <code>family='binomial'</code>) or a numeric vector of weights, one per row in <code>data</code> or the name of the column in <code>data</code> that contains site weights. If <code>FALSE</code>, then each datum gets a weight of 1.</dd>


<dt>data</dt>
<dd>Data frame</dd>


<dt>resp</dt>
<dd>Name of response column</dd>


<dt>family</dt>
<dd>Name of family</dd>

</dl>

.calcWeights: Calculate weights for a model

Description

Usage

Value

Arguments