fv_pcf

is.fv_pcf

print.fv_pcf

summary.fv_pcf

Advanced Use Only. This low-level function creates an object of class
"fv_pcf" from raw numerical data.

The adapted pair correlation function transfers the concept of the
pair correlation function from point patterns to patterns of objects of
finite size and irregular shape (e.g. lakes within a country). The pair
correlation function describes the spatial distribution of objects, e.g.
random, aggregated or regularly spaced. This is a reimplementation of the
method suggested by Nuske et al. (2009) <doi:10.1016/j.foreco.2009.09.050>
using the library 'GEOS'.

Robert Nuske

apcf

Adapted Pair Correlation Function

fv_pcf function

<dl><dt>df</dt>
<dd>A data frame with at least 2 columns named 'r' and 'g' containing
the values of the function argument (r) and the corresponding values
(g). Usually the upper 'upr' and lower 'lwr' bounds of a pointwise
critical envelope are passed along as well.</dd>
<dt>n_sim</dt>
<dd>Integer. Number of generated simulated patterns used for
computing the envelope</dd>
<dt>n_rank</dt>
<dd>Integer. Rank of the envelope value amongst the <code>n_sim</code>
simulated values. A rank of 1 means that the minimum and maximum
simulated values will be used.</dd>
<dt>correc</dt>
<dd>String. Choice of edge correction (eg. "Ripley").</dd>
<dt>kernel</dt>
<dd>String. Choice of smoothing kernel (eg. "epanechnikov").</dd>
<dt>stoyan</dt>
<dd>Bandwidth coefficient used in smoothing kernel.</dd>
<dt>bw</dt>
<dd>Bandwidth used in smoothing kernel.</dd>
<dt>x, obj, object</dt>
<dd>an R object, preferably of class <code>fv_pcf</code></dd>
<dt>...</dt>
<dd>additional parameter</dd></dl>

Arguments

Class fv_pcf: Function Value Table for PCFs — fv_pcf

<dl>

<dt>df</dt>
<dd>A data frame with at least 2 columns named 'r' and 'g' containing
the values of the function argument (r) and the corresponding values
(g). Usually the upper 'upr' and lower 'lwr' bounds of a pointwise
critical envelope are passed along as well.</dd>


<dt>n_sim</dt>
<dd>Integer. Number of generated simulated patterns used for
computing the envelope</dd>


<dt>n_rank</dt>
<dd>Integer. Rank of the envelope value amongst the <code>n_sim</code>
simulated values. A rank of 1 means that the minimum and maximum
simulated values will be used.</dd>


<dt>correc</dt>
<dd>String. Choice of edge correction (eg. "Ripley").</dd>


<dt>kernel</dt>
<dd>String. Choice of smoothing kernel (eg. "epanechnikov").</dd>


<dt>stoyan</dt>
<dd>Bandwidth coefficient used in smoothing kernel.</dd>


<dt>bw</dt>
<dd>Bandwidth used in smoothing kernel.</dd>


<dt>x, obj, object</dt>
<dd>an R object, preferably of class <code>fv_pcf</code></dd>


<dt>...</dt>
<dd>additional parameter</dd>

</dl>

fv_pcf: Class fv_pcf: Function Value Table for PCFs

Description

Usage

Value

Arguments