ade4 (version 1.01)

within: Within Analyses

Description

performs within analyses on an object of class dudi.

Usage

within(dudi, fac, scannf = TRUE, nf = 2) 
plot.within (x, xax = 1, yax = 2, ...) 
print.within (x, ...)

Arguments

dudi

an object of class 'dudi'

fac

a factor distributing the rows of dudi$tab in classes

scannf

a logical value indicating whether the eigenvalues bar plot should be displayed

nf

if scannf FALSE, an integer indicating the number of kept axes

xax

the column number for the x-axis

yax

the column number for the y-axis

x

an object of class 'within'

...

further arguments passed to or from other methods

Value

• Returns a list of the sub-class 'within' in the class 'dudi'
• call
  origine
• nf
  number of axis saved
• rank
  rank
• ratio
  percentage of within inertia
• eig
  numeric eigen values
• lw
  numeric row weigths
• cw
  numeric col weigths
• tabw
  numeric table weigths
• fac
  factor for grouping
• tab
  data frame class-variables
• li
  data frame row coordinates
• l1
  data frame row normed scores
• co
  data frame column coordinates
• $c1
  data frame column normed scores
• ls
  data frame supplementary row coordinates
• as
  data frame inertia axis onto within axis

References

Benz�cri, J. P. (1983) Analyse de l'inertie intra-classe par l'analyse d'un tableau de correspondances. Les Cahiers de l'Analyse des donn�es, 8, 351--358. Dol�dec, S. and Chessel, D. (1987) Rythmes saisonniers et composantes stationnelles en milieu aquatique I- Description d'un plan d'observations complet par projection de variables. Acta Oecologica, Oecologia Generalis, 8, 3, 403--426.

Examples

data(meaudret)
par(mfrow = c(2,2))
pca1 <- dudi.pca(meaudret$mil, scan = FALSE, nf = 4)
s.traject(pca1$li, meaudret$plan$sta, 
    sub = "Principal Component Analysis", csub = 1.5)
wit1 <- within(pca1, meaudret$plan$sta, scan = FALSE, nf = 2)
s.traject(wit1$li, meaudret$plan$sta, 
    sub = "Within site Principal Component Analysis", csub = 1.5)
s.corcircle (wit1$as)
par(mfrow = c(1,1))
plot(wit1)