Fig. 10From: Modeling size-density trajectories of even-aged ash (Fraxinus excelsior L.) stands in France. A baseline to assess the impact of Chalara ash diebackDetails on the fitting process of size-density trajectories of ash: commented functions of the R environment for statistical computing and its nlme package used to fit the mixed model to the ash data discussed in the study (R Development Core Team 2012)Back to article page