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The ade4 Package - NexTag Supports Open Source Initiatives

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112 gridrowcol<br />

gridrowcol<br />

Complete regular grid analysis<br />

Description<br />

This function defines objects to analyse data sets associated with complete regular grid.<br />

Usage<br />

gridrowcol(nrow, ncol, cell.names = NULL)<br />

Arguments<br />

nrow<br />

ncol<br />

cell.names<br />

size of the grid (number of rows)<br />

size of the grid (number of columns)<br />

grid cell labels<br />

Value<br />

Returns a list containing the following items :<br />

xy<br />

area<br />

neig<br />

orthobasis<br />

: a data frame with grid cell coordinates<br />

: a data frame with three variables to display grid cells as areas<br />

: an object of class ’neig’ corresponding to a neighbouring graph of the grid<br />

(rook case)<br />

: an object of class ’orthobasis’ corresponding to the analytical solution<br />

for the neighbouring graph<br />

Author(s)<br />

Sébastien Ollier 〈ollier@biomserv.univ-lyon1.fr〉<br />

Daniel Chessel<br />

References<br />

Méot, A., Chessel, D. and Sabatier, D. (1993) Opérateurs de voisinage et analyse des données<br />

spatio-temporelles. in J.D. Lebreton and B. Asselain, editors. Biométrie et environnement. Masson,<br />

45-72.<br />

Cornillon, P.A. (1998) Prise en compte de proximités en analyse factorielle et comparative. Thèse,<br />

Ecole Nationale Supérieure Agronomique, Montpellier.<br />

See Also<br />

orthobasis, orthogram, mld

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