Projections of Supplementary Rows
This function performs a projection of supplementary rows (i.e. supplementary individuals).
## S3 method for class 'coa' suprow(x, Xsup, ...) ## S3 method for class 'dudi' suprow(x, Xsup, ...) ## S3 method for class 'dudi' predict(object, newdata, ...) ## S3 method for class 'pca' suprow(x, Xsup, ...) ## S3 method for class 'acm' suprow(x, Xsup, ...) ## S3 method for class 'mix' suprow(x, Xsup, ...) ## S3 method for class 'fca' suprow(x, Xsup, ...)
x, object |
an object of class |
Xsup, newdata |
an array with the supplementary rows |
... |
further arguments passed to or from other methods |
If suprow.dudi is used, the column vectors of Xsup are projected without prior modifications onto the principal components of dudi with the scalar product associated to the row weightings of dudi.
predict returns a data frame containing the coordinates of the supplementary rows. suprow returns a list with the transformed table Xsup in tabsup and the coordinates of the supplementary rows in lisup.
Daniel Chessel
Anne-Béatrice Dufour anne-beatrice.dufour@univ-lyon1.fr
Gower, J. C. (1967) Multivariate analysis and multivariate geometry. The statistician, 17, 13–28.
data(euro123)
par(mfrow = c(2, 2))
w <- euro123[[2]]
dudi1 <- dudi.pca(w, scal = FALSE, scan = FALSE)
if(adegraphicsLoaded()) {
g11 <- s.arrow(dudi1$c1, psub.text = "Classical", psub.posi = "bottomright", plot = FALSE)
g12 <- s.label(suprow(dudi1, w)$tabsup, plab.cex = 0.75, plot = FALSE)
g1 <- superpose(g11, g12)
g21 <- s.arrow(dudi1$c1, psub.text = "Without centring", psub.posi = "bottomright", plot = FALSE)
g22 <- s.label(suprow(dudi1, w)$tabsup, plab.cex = 0.75, plot = FALSE)
g2 <- superpose(g21, g22)
g3 <- triangle.label(w, plab.cex = 0.75, label = row.names(w), adjust = FALSE, plot = FALSE)
g4 <- triangle.label(w, plab.cex = 0.75, label = row.names(w), adjust = TRUE, plot = FALSE)
G <- ADEgS(list(g1, g2, g3, g4), layout = c(2, 2))
} else {
s.arrow(dudi1$c1, sub = "Classical", possub = "bottomright", csub = 2.5)
s.label(suprow(dudi1, w), add.plot = TRUE, clab = 0.75)
s.arrow(dudi1$c1, sub = "Without centring", possub = "bottomright", csub = 2.5)
s.label(suprow(dudi1, w), clab = 0.75, add.plot = TRUE)
triangle.plot(w, clab = 0.75, label = row.names(w), scal = FALSE)
triangle.plot(w, clab = 0.75, label = row.names(w), scal = TRUE)
}
data(rpjdl)
rpjdl.coa <- dudi.coa(rpjdl$fau, scann = FALSE, nf = 4)
rpjdl.coa$li[1:3, ]
suprow(rpjdl.coa,rpjdl$fau[1:3, ])$lisup #the same
data(deug)
deug.dudi <- dudi.pca(df = deug$tab, center = deug$cent, scale = FALSE, scannf = FALSE)
suprow(deug.dudi, deug$tab[1:3, ])$lisup #the supplementary individuals are centered
deug.dudi$li[1:3, ] # the samePlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.