labdsv: vegtab – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

vegtab

Vegetation Table

Description

Produces an ordered table of abundance of species in samples, sub-sampled by (an optional) classification of the samples

Usage

vegtab(comm,set,minval=1,pltord,spcord,pltlbl,trans=FALSE)

Arguments

`comm`	a vegetation (or other taxon) data.frame
`set`	a logical variable specifying which samples to include
`minval`	a minimum abundance threshold to include in the table
`pltord`	a numeric vector specifying the order of rows in the output
`spcord`	a numeric vector specifying the order of columns in the output
`pltlbl`	a vector specifying an alternative row label (must be unique!)
`trans`	a logical variable to control transposing the table

Details

Subsets a vegetation data.frame according to specified plots or minimum species abundances, optionally ordering in arbitrary order.

Value

a data.frame with specified rows, columns, and row.names

Note

Vegetation tables are a common tool in vegetation analysis. In recent years analysis has tended to become more quantitative, and less oriented to sorted tables, but even still presenting the results from these analyses often involves a sorted vegetation table.

Author(s)

David W. Roberts droberts@montana.edu http://ecology.msu.montana.edu/droberts/droberts.html

References

http://ecology.msu.montana.edu/labdsv/R/labs/lab3/lab3.html

Examples

data(bryceveg)  # returns a vegetation data frame called bryceveg
data(brycesite) # returns an environmental data frame called 
                # brycesite
vegtab(bryceveg,minval=10,pltord=brycesite$elev)
        # produces a sorted table for species whose abundance sums
        # to 10, with rows in order of elevation.

labdsv

Ordination and Multivariate Analysis for Ecology

v2.0-1

GPL (>= 2)

Authors

David W. Roberts <droberts@montana.edu>

Initial release