ade4 (version 1.2-2)

gridrowcol: Complete regular grid analysis

Description

This function defines objects to analyse data sets associated with complete regular grid.

Usage

gridrowcol(nrow, ncol, cell.names = NULL)

Arguments

nrow

size of the grid (number of rows)

ncol

size of the grid (number of columns)

cell.names

grid cell labels

Value

• Returns a list containing the following items :
• xy
  : a data frame with grid cell coordinates
• area
  : a data frame with three variables to display grid cells as areas
• neig
  : an object of class 'neig' corresponding to a neighbouring graph of the grid (rook case)
• orthobasis
  : an object of class 'orthobasis' corresponding to the analytical solution for the neighbouring graph

References

M�ot, A., Chessel, D. and Sabatier, D. (1993) Op�rateurs de voisinage et analyse des donn�es spatio-temporelles. in J.D. Lebreton and B. Asselain, editors. Biom�trie et environnement. Masson, 45-72.

Cornillon, P.A. (1998) Prise en compte de proximit�s en analyse factorielle et comparative. Th�se, Ecole Nationale Sup�rieure Agronomique, Montpellier.

See Also

orthobasis, orthogram, mld

Examples

w <- gridrowcol(8,5)
par(mfrow = c(1,2))
area.plot(w$area,center = w$xy, graph = w$neig, clab = 0.75)
area.plot(w$area,center = w$xy, graph = w$neig, clab = 0.75,
 label = as.character(1:40))
par(mfrow = c(1,1))

par(mfrow = c(5,8))
for(k in 1:39)
    s.value(w$xy, w$orthobasis[,k], csi = 3, cleg = 0, csub = 2,
     sub = as.character(signif(attr(w$orthobasis, "values")[k],3)),
      incl = FALSE, addax = FALSE, cgr = 0, ylim = c(0,10))
par(mfrow = c(1,1))