ktab.match2ktabs {ade4} | R Documentation

## STATIS and Co-Inertia : Analysis of a series of paired ecological tables

### Description

Prepares the analysis of a series of paired ecological tables. Partial Triadic Analysis (see `pta`) can be used thereafter to perform the analysis of this k-table.

### Usage

    ktab.match2ktabs(KTX, KTY)

### Arguments

`KTX` | an objet of class `ktab`
`KTY` | an objet of class `ktab`

### Value

a list of class `ktab`, subclass `kcoinertia`. See `ktab`

### WARNING

IMPORTANT : `KTX` and `KTY` must have the same k-tables structure, the same number of columns, and the same column weights.

### Author(s)

Jean Thioulouse ade4@biomserv.univ-lyon1.fr

### References

Thioulouse J., Simier M. and Chessel D. (2004). Simultaneous analysis of a sequence of paired ecological tables. Ecology 85, 272-283..

Simier, M., Blanc L., Pellegrin F., and Nandris D. (1999). Approche simultanée de K couples de tableaux : Application a l'étude des relations pathologie végétale - environnement. Revue de Statistique Appliquée, 47, 31-46.

### Examples

    data(meau)
    wit1 <- within.pca(meau$mil, meau$plan$dat, scan = FALSE, scal = "total")
    pcafau <- dudi.pca(meau$fau, scale = FALSE, scan = FALSE, nf = 2)
    wit2 <- within(pcafau, meau$plan$dat, scan = FALSE, nf = 2)
    kta1 <- ktab.within(wit1, colnames = rep(c("S1","S2","S3","S4","S5","S6"), 4))
    kta2 <- ktab.within(wit2, colnames = rep(c("S1","S2","S3","S4","S5","S6"), 4))
    kcoi <- ktab.match2ktabs(kta1, kta2)
    ptacoi <- pta(kcoi, scan = FALSE, nf = 2)
    plot(ptacoi)
    kplot(ptacoi)

[Package Contents]