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...n of actual hits, but am curious to compare this to an estimate from a density estimation. Unfortunately when using poldlogspline, this probability is always=0 (simulated data example is below). How can this be, given that the density is highest at area=0? > simdat<-c(rep(0,8),rexp(92)) > myspline<-oldlogspline(simdat,lbound=0) > poldlogspline(fit=myspline, q=0) [1] 0 Any help to work out the probability of an area value in my distribution = 0 would be appreciated Terry Beutel Agri-Science Queensland [[alternative HTML version deleted]]