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...have been developped separately and I don't see how I could specify time to be able to plot regular and irregurlar time series on the same graph --- if it is possible in R--. Thanks in advance for your answer Best regards Isabelle -- Isabelle BRAUD Cemagref Unit? de recherche Hydrologie-Hydraulique 3bis quai Chauveau CP 220 69336 Lyon C?dex 9 Tel: 04 72 20 87 78 Fax: 04 78 47 78 75 E-mail: isabelle.braud at cemagref.fr

...ncies and even irregular time series. Is it still possible in R? Thanks in advance for your answers. Best wishes Isabelle Braud *************************************************************** Isabelle BRAUD Chargée de recherche au LTHE-Grenoble/CEMAGREF-Lyon CEMAGREF Unité de Recherche Hydrologie-Hydraulique 3 bis, Quai Chauveau, CP 220 69336 Lyon Cedex 9 Tel: 04 72 20 87 78 (from abroad 33 4 72 20 87 78) Fax: 04 78 47 78 75 (from abroad 33 4 78 47 78 75) E-mail: braud at lyon.cemagref.fr ou Isabelle.Braud at hmg.inpg.fr [[alternative HTML version deleted]]

...; > > Reason for termination: The cosine of the angle between `fvec' and any column of the > Jacobian is at most `gtol' in absolute value. > I dont know what I can do for solve my problem > > Here his the code > > #fonction pour simulation des donn?es de conductivit? hydraulique > f.k <- function(h, alp, n, L, ksat){ > ksat <- 0.000108 > k.mod <-expression(ksat+((((1+(alp*h)^n)^(n-(1/n))-((alp*h)^(n-1)))^2)/((1+(alp*h)^n)^((n-(1/n))*(L+2))))) > > eval (k) > } > #fonction d'aide pour le gradient analytique > j.k <- function(h, alp...