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...nately the R software displays “error in as.vector(x,mode= “double”) : the object (list) can not be automatically converted on double” so what shall I do to run this two tests(lyapunov and bds)? And what is my mistake? I thank you in advance and I’am waiting forward your e-mail This si my e-mail: karimmgo@laposte.net Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,34 €/mn) ; tél : 08 92 68 13 50 (0,34€/mn) [[alternative HTML version deleted]]

Hi, I am trying to runn a age-period-cohort model, but here is what I am having problem with, hope you can help me! This is what I am trying to do: sumzero_a<-((A-min(A))/5+1) - mean((A-min(A))/5+1) where A is my age variable (numeric, the mid-point of a five-year age group), but I got the following error: Error in min(..., na.rm = na.rm) : invalid 'mode' of argument I am pretty