Re: [R] Comparing means and trends in short time-series

2010-02-09 Thread Simone Vincenzi
I received also this message that did not show up here: This sounds like a problem in (linear) mixed effects models. Look into packages nlme (with the lme() function) and lme4 (function lmer()) for starters. What you have falls under the heading of longitudinal or repeated measures data. Both pack

Re: [R] Comparing means and trends in short time-series

2010-02-09 Thread Dieter Menne
Simone Vincenzi-2 wrote: > > I have a statistical problem with the comparison of short time-series, > representing densities of fish in different streams. For each stream (6 in > total, here below showed only part of the dataset) I have 8 years of > density > data, as follows: > > >year

[R] Comparing means and trends in short time-series

2010-02-09 Thread Simone Vincenzi
Dear R-list, I have a statistical problem with the comparison of short time-series, representing densities of fish in different streams. For each stream (6 in total, here below showed only part of the dataset) I have 8 years of density data, as follows: year density stream 1 2000 0.51 s