ktab.match2ktabs {ade4} | R Documentation |
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.
ktab.match2ktabs(KTX, KTY)
KTX |
an objet of class |
KTY |
an objet of class |
a list of class ktab
, subclass kcoinertia
. See ktab
IMPORTANT : KTX
and KTY
must have the same k-tables structure, the same number
of columns, and the same column weights.
Jean Thioulouse Jean.Thioulouse@univ-lyon1.fr
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.
data(meau) wit1 <- withinpca(meau$env, meau$design$season, scan = FALSE, scal = "total") pcaspe <- dudi.pca(meau$spe, scale = FALSE, scan = FALSE, nf = 2) wit2 <- wca(pcaspe, meau$design$season, 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)