[R] Include zero density on unsampled species

Dear R experts, how are you? I have a data bank in long format as below: species monthyear plotdensity sp1 1 2001 1 39 sp2 1 2001 1 6 sp3 1 2001 1 17 s

[R] Assumptions of oneway_test in coin package

Hi everybody, I want to test differences in means among independent groups (more that two). The assumptions of normality and homocedasticity are violated, but I don´t want to use rank tests like Kruskal-Wallis, because I lose too much information under this rank transformation. Can I use oneway_te

[R] AIC values with lmer and anova function

Dear colleagues, I have a data from a repeated measures design that I'm analysing through a mixed model. Nine independent sampling units (flasks with culture medium with algae) were randomly divided into 3 groups ("c", "t1", "t2"). There is no need for inclusion of the random effect of the interce

[R] Dúvida função Anova pacote car - Medidas repetidas

Olá pessoal, estou realizando uma ANOVA com medidas repetidas e estou utilizando a função "Anova" do pacote "car". Medi o biovolume de algas a cada dois dias durante 10 dias (no banco de dados abaixo só coloquei até o 4° dia). Tenho 2 tratamentos ("c","t") e o experimento foi realizado em tréplica

Re: [R] How to make a Cluster of Clusters

Hi Michael, I agree with you and I will make this ordination. But I also want to check a spatial correlation of the variables, so I thought that comparing the dendrogram of the environmental variables with the dendrogram of the geographical distances of the lakes it will indicates if similar lakes

[R] How to make a Cluster of Clusters

s? Actually I did it by hand and got very good and meaningful results, but I want to implement it to try another merging criterias. Thanks Diego Pujoni Zooplankton Ecology Laboratory Biological Sciences Institute Federal University of Minas Gerais Brazil ___