asim14_f: Resampling with row/column species richness and abundances...

In irhoppe/cooccur: Abundance Matrix Randomizations

Description

Two-step algorithm for randomizing an abundance matrix.

Usage

asim14_f(speciesData, swaps = NULL)

Arguments

speciesData

species-by-site abundance matrix

Details

Equivalent to algorithm IF in Ulrich and Gotelli (2010), and to the Fortran subroutine iff in Gotelli (2008).

Value

shuffled abundance matrix

Caution

May generate matrices with empty rows(species) or columns (sites).

References

Ulrich, W. 2008. Program Co-Occurrence. Version 1.

Ulrich, W. and Gotelli, N.J. 2010. Null model analysis of species associations using abundance data. Ecology 91:3384-3397.

See Also

Other abundance matrix null models: asim10_f(), asim10(), asim11_f(), asim11(), asim12_f(), asim12(), asim13_f(), asim13(), asim14(), asim1_f(), asim1(), asim2_f(), asim2(), asim3_f(), asim3(), asim4_f(), asim4(), asim5_f(), asim5(), asim6_f(), asim6(), asim7_f(), asim7(), asim8_f(), asim8(), asim9_f(), asim9()

Examples

amat <- rmat(20,12) # creates a random 20 x 12 abundance matrix
asim14_f(amat)      # performs proportional abundance resampling algorithm

irhoppe/cooccur documentation built on Jan. 1, 2021, 4:23 a.m.