"ppp"representing the point pattern of plant locations. Entries include
xCartesian $x$-coordinate of plant
yCartesian $y$-coordinate of plant
marksfactor with levels 0,1, 2 indicating age } See
ppp.objectfor details of the format.
The data were recorded and analysed by Hutchings (1979) and further analysed by Diggle (1981a, 1981b, 1983), Diggle and Milne (1983), and Van Lieshout and Baddeley (1999). All analyses found that the pattern of newly emergent canes exhibits clustering, which Hutchings attributes to ``vigorous vegetative reproduction''.
Diggle, P. J. and Milne, R. K. (1983) Bivariate Cox processes: some models for bivariate spatial point patterns. Journal of the Royal Statistical Soc. Series B 45, 11--21. Hutchings, M. J. (1979) Standing crop and pattern in pure stands of Mercurialis perennis and Rubus fruticosus in mixed deciduous woodland. Oikos 31, 351--357. Van Lieshout, M.N.M. and Baddeley, A.J. (1999) Indices of dependence between types in multivariate point patterns. Scandinavian Journal of Statistics 26, 511--532.