spatialsegregation-helpers {spatialsegregation}R Documentation

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 a component dbh).

Usage

 clean_up_data(pp, dbh = 10, atleast = 10)
 freqs(pp)
 minusID(pp, minusR, dbh = 0, 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

Date: 2009-04-03
License: GPL v2 or later

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.

Author(s)

Tuomas Rajala University of Jyvaskyla, Finland tarajala@maths.jyu.fi


[Package spatialsegregation version 1.93 Index]