Alternative Rank Abundance Fitting Results

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Description

Provides alternative methods of obtaining rank abundance curves than provided by functions radfit, fisherfit and prestonfit (vegan), although these same functions are called.

Usage

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radfitresult(x,y="",factor="",level,plotit=T)

Arguments

x

Community data frame with sites as rows, species as columns and species abundance as cell values.

y

Environmental data frame.

factor

Variable of the environmental data frame that defines subsets to calculate fitted rank-abundance curves for.

level

Level of the variable to create the subset to calculate fitted rank-abundance curves.

plotit

Plot the results obtained by plot.radfit .

Details

These functions provide some alternative methods of obtaining fitted rank-abundance curves, although functions radfit, fisherfit and prestonfit (vegan) are called to calculate the actual results.

Value

The function returns the results from three methods of fitting rank-abundance curves:

radfit

results of radfit.

fisherfit

results of fisherfit.

prestonfit

results of prestonfit.

Optionally, a plot is provided of the radfit results by plot.radfit.

Author(s)

Roeland Kindt (World Agroforestry Centre)

References

Kindt, R. & Coe, R. (2005) Tree diversity analysis: A manual and software for common statistical methods for ecological and biodiversity studies.

http://www.worldagroforestry.org/output/tree-diversity-analysis

Examples

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library(vegan)
data(BCI)
BCIall <- t(as.matrix(colSums(BCI)))
radfitresult(BCIall)

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