Energy_fun

internal

Analyse species-habitat associations in R. Therefore, information about the location
of the species (as a point pattern) is needed together with environmental conditions
(as a categorical raster). To test for significance habitat associations, one of
the two components is randomized. Methods are mainly based on Plotkin et al. (2000)
<doi:10.1006/jtbi.2000.2158> and Harms et al. (2001) <doi:10.1111/j.1365-2745.2001.00615.x>.

Maximillian H.K. Hesselbarth

shar

Species-Habitat Associations

Maximilian H.K. Hesselbarth

Marco Sciaini

Chris Wudel

Zeke Marshall

Thomas Etherington

Janosch Heinermann

Energy_fun function

<dl><dt>f</dt>
<dd>Result of the calc_moments_full function which represents
product-moment contribution of a point at coordinates x, y with marks,
for the whole new ponit pattern.</dd>
<dt>f0</dt>
<dd>Column sums of the weights of the brand correlation functions of
the new point pattern.</dd>
<dt>statistics</dt>
<dd>Results of the compute_statistics function for the
new point pattern (calculation of optional spatial statistics).</dd>
<dt>fn</dt>
<dd>Determination of the weightings of the mark correlation functions.</dd>
<dt>p</dt>
<dd>Defines the initial state of the new ponit pattern.</dd>
<dt>p_</dt>
<dd>Reference point pattern.</dd>
<dt>Lp</dt>
<dd>Distance measure for the calculation of the energy function
(Lp distance, 1 &lt;= p &lt;Inf).</dd>
<dt>w_statistics</dt>
<dd>Vector of named weights for optional spatial statistics
from the <code>spatstat</code> package to be included in the energy calculation.This may
include Dk, K, Hs, pcf.</dd></dl>

Arguments

energy_fun — Energy_fun

<dl>

<dt>f</dt>
<dd>Result of the calc_moments_full function which represents
product-moment contribution of a point at coordinates x, y with marks,
for the whole new ponit pattern.</dd>


<dt>f0</dt>
<dd>Column sums of the weights of the brand correlation functions of
the new point pattern.</dd>


<dt>statistics</dt>
<dd>Results of the compute_statistics function for the
new point pattern (calculation of optional spatial statistics).</dd>


<dt>fn</dt>
<dd>Determination of the weightings of the mark correlation functions.</dd>


<dt>p</dt>
<dd>Defines the initial state of the new ponit pattern.</dd>


<dt>p_</dt>
<dd>Reference point pattern.</dd>


<dt>Lp</dt>
<dd>Distance measure for the calculation of the energy function
(Lp distance, 1 &lt;= p &lt;Inf).</dd>


<dt>w_statistics</dt>
<dd>Vector of named weights for optional spatial statistics
from the <code>spatstat</code> package to be included in the energy calculation.This may
include Dk, K, Hs, pcf.</dd>

</dl>

energy_fun

Energy_fun: energy_fun

Description

Usage

Value

Arguments

Details