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...val(0.5, 0.05)}. Then I want to run the model for 1000 time steps (or more) and estimate the asymptotic stochastic growth rate. Is there a command that enable this kind of modelling? Thank you, Best wishes, Privalan -- View this message in context: http://www.nabble.com/stochastic-growth-rate-%28package-biopop%29-tp14800951p14800951.html Sent from the R help mailing list archive at Nabble.com.

Dear UseR, I do not know if this a problem with me, my data or cph/survest in package design. The example below works with a standard data set, but not with my data, but I cannot locate the problem. Note that I am using an older package of survival to avoid a problem with the newly renamed function in survival meeting Design. Dieter # First, check standard example to make sure library(Design)