spatialsegregation (version 2.40)

helper functions: Functions for the aid of segregation measures

Description

Small functions included in package spatialsegregation, used for manipulation of forest datasets which have dbh-values (pp with an element $dbh).

Usage

clean.up.data(pp, dbh = 10, atleast = 10) freqs(pp) minusID(pp, minusR, dbh, atleast=0) shake(pp, a = 0.001)

Arguments

pp

Multitype point pattern (see package 'spatstat')

atleast

Include specii with abundance atleast atleast.

dbh

Include only those points with dbh atleast dbh.

minusR

Range from the border withing which to exluce points (used for correction of estimates).

a

Size of displacement: x+Unif(-a,a), y+Unif(-a,a).

Details

Small functions to manipulate multitype point patterns.

clean.up.data: Returns a subsample fullfilling the given constrains.

freqs: Returns the abundance vector.

minusID: Returns a 0-1-vector indicating inclusion in a simple minus-correction.

shake: Shakes the pattern, i.e. adds a random displacement shift to each point.