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...e(T1,T2) toto y <- strptime(T1,"%m/%d/%y %H:%M") x <- strptime(T2,"%m/%d/%y %H:%M") difftime(x,y) but, i don't know how can i do in order to obtain something like this : ans <- c(69,2,NA) res <- data.frame(T1,T2,ans) res what is to be done ? Thanks. Florent Bonneu Laboratoire de Statistique et Probabilit??s bureau 148 b??t. 1R2 Universit?? Toulouse 3 118 route de Narbonne - 31062 Toulouse cedex 9 bonneu at cict.fr

...edPointProcess) # Program # data(BITOEK) win <- ripras(steigerwald$coord) PointProcess <- ppp(x=steigerwald$coord[,1],y=steigerwald$coord[,2],window=win,marks=steigerwald$diam) plot(PointProcess) rfm.test(coord=steigerwald$coord,steigerwald$diam,MCrepetitions=19) ----- regards. Florent Bonneu Laboratoire de Statistique et Probabilit??s bureau 148 b??t. 1R2 Universit?? Toulouse 3 118 route de Narbonne - 31062 Toulouse cedex 9 bonneu at cict.fr

...;, "1/1/04 1:55", "1/1/04 2:14", "1/1/04 9:05") Place <- c("x1","x1","x3","x4","x5") X <- c(1,1,2,3,6) Y <- c(1,1,9,7,8) toto <- data.frame(Num,Date,Place,X,Y) Somebody know how to do ? Thanks. Florent Bonneu Laboratoire de Statistique et Probabilits bureau 148 bt. 1R2 Universit Toulouse 3 118 route de Narbonne - 31062 Toulouse cedex 9 bonneu at cict.fr <mailto:bonneu at cict.fr>

...rd Berthelsen; Abdollah Jalilian; Marie-Colette van Liesho ut; Ege Rubak; Dominic Schuhmacher; and Rasmus Waagepetersen. Additional contributions by Q.W. Ang; S. Azaele; C. Beale; R. Bernhardt; T. Bendtsen; A. Bevan; B. Biggerstaff; R. Bivan d; F. Bonneu; J. Burgos; S. Byers; Y.M. Chang; J.B. Che n; I. Chernayavsky; Y.C. Chin; B. Christensen; J.-F. Co eurjolly; R. Corria Ainslie; M. de la Cruz; P. Dalgaard; P.J. Dig gle; P. Donnelly; I. Dryden; S. Eglen; O. Flores; N. Funwi-Gabga;...