dbTab2mat: Transform a checklist of species into a matrix of presences...

In marbotte/ecolUtil: Utilities for ecological data management and analyses

Description

The function

Usage

dbTab2mat(dbTab,col_samplingUnits="SU",col_species="sp",col_content="abundance",empty=NA,checklist=F)

Arguments

dbTab	data.frame containing the data
col_samplingUnits	name of the column of dbTab which contains the locations, sites or sampling units
col_species	name of the column of dbTab which contains the species names
col_content	name of the column of dbTab which contains the presence, abundance or any content that we want to fill the matrix
empty	Value used to fill the matrix when the couple Sampling unit / species is not given in dbTab (absences of the species). If NA, the value is deduced from the mode of the col_content column
checklist	True when there is actually no col_content, and that dbTab is only a checklist of species occurrences

Value

A table sampling units/species with presences or abundances of the species. Note that if checklist is TRUE, then the result will be a logical matrix, that takes less memory space. Note that mutiplicating

Author(s)

Bottin, Marius

See Also

mat2dbTab

Examples

(dbTab<-data.frame(SU=rep(paste("site",1:10,sep=""),10),sp=rep(paste("sp",1:10,sep=""),each=10),abundance=sample(1:5,100,prob=c(10,7,3,2,1),replace=T))[sample(1:100,30),])
dbTab2mat(dbTab)

marbotte/ecolUtil documentation built on May 31, 2019, 11:44 p.m.