Le 22/03/13 12:34, Sahana Srinivasan a écrit :
while (a<=10) { while (b<=10) { n<-as.numeric(df[a,b)]; ...; } }The problem is that when I print out 'n' I get the following errors : "NULL" (if printed without as.numeric), and "numeric(0)" if printed with the as.numeric.
Perhaps with n<-as.numeric(df[a,b]) )] are reversed Marc -- __________________________________________________________ Marc Girondot, Pr Laboratoire Ecologie, Systématique et Evolution Equipe de Conservation des Populations et des Communautés CNRS, AgroParisTech et Université Paris-Sud 11 , UMR 8079 Bâtiment 362 91405 Orsay Cedex, France Tel: 33 1 (0)1.69.15.72.30 Fax: 33 1 (0)1.69.15.73.53 e-mail: marc.giron...@u-psud.fr Web: http://www.ese.u-psud.fr/epc/conservation/Marc.html Skype: girondot ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
