Hi Manuel, > If I want to compare the metric among the 3 zones, is it the following an > appropriate model parameterization in lme4?:
It depends on your data and the most sensible grouping structure for your data. You could explore different random effect structures and compare them using an information criterion approach; however, I think it is more reasonable, before allowing the program to make decisions for you, to determine if a temporal grouping structure exists in your data and then determine at what scale that is present. Plotting the data is always helpful to see this. Hope this helps. Best, > On Jan 19, 2021, at 10:54, Manuel Spínola <[email protected]> wrote: > > Dear list members, > > I have an ecological data set, and I want to account for the > spatio-temporal structure of my data: > > metric = response variable (continuous) > zone = 3 zones (A, B and C) > location = 12 sampling locations per zone > min = minute > hour = hour > day = day > > metric zone location minute hour day > 2.4 A 1A 1 1 1 > 2.7. A. 1A 2 1 1 > > 1.7. C 1C. 45 3 5 > > > If I want to compare the metric among the 3 zones, is it the following an > appropriate model parameterization in lme4?: > > mod_01 <- lmer(metric ~ zone + (1 | location) + (1 | day/hour/min), data = > my_data) > > Thank you very much in advance. > > Manuel > > -- > *Manuel Spínola, Ph.D.* > Instituto Internacional en Conservación y Manejo de Vida Silvestre > Universidad Nacional > Apartado 1350-3000 > Heredia > COSTA RICA > [email protected] <[email protected]> > [email protected] > Teléfono: (506) 8706 - 4662 > Personal website: Lobito de río <https://sites.google.com/site/lobitoderio/> > Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/> > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-ecology mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology “What is best in mathematics deserves not merely to be learnt as a task, but to be assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.” Bertrand Russell ————————————————————— CGG Graduate Assistant (PhD) Archie Carr Center for Sea Turtle Research Department of Biology University of Florida Tel: (+1) 352-284-5650 Website: http://accstr.ufl.edu/ Skype: geoglen12 Email: [email protected] _______________________________________________ R-sig-ecology mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
