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...ked at the code in smoothScatter and there is a call to grDevices:::.smoothScatterCalcDensity(), which in turn calls KernSmooth::bkde2D(). This gets fixed by adding KernSmooth as suggested package in EDASeq. I was able to reproduce this issue (and the fix) in a small R package: https://github.com/drisso/rmini/tree/smooth I have a few questions: isn't it unusual the way smoothScatter calls grDevices:::.smoothScatterCalcDensity() and KernSmooth::bkde2D(), i.e., without requiring the packages? Shouldn't "graphics" suggest "KernSmooth"? Best regards, Davide -- Davide...