[R-sig-eco] Post Hoc tests GLM

[Javier Atalah]

Hi Luis,
Try the function testInteractions from the package phia.
Best regards,
Javier


________________________________________
From: r-sig-ecology-bounces at r-project.org [r-sig-ecology-bounces at r-project.org] on behalf of Luis Fernando García [luysgarcia at gmail.com]
Sent: 21 September 2013 10:40
To: r-sig-ecology at r-project.org
Subject: [R-sig-eco] Post Hoc tests GLM

Dear Fellows,

I am trying to build a model in order to test the influence of the time of
the day, on sex and behavioural category. After performing several
modelations I chosen the best model which is

glm(formula = Frec ~ Group+ Hour:Category, family = poisson)

summarizing I have

                    Df Deviance Resid. Df Resid. Dev Pr(>Chi)
NULL                                   41    6027,36
Group                 2     6,15        39    6021,21   0,0462
Category:Hour 13  5972,08        26      49,13  <0,0001


I found significative effects of sex and behaviour:time interaction.
Nevertheless I am having lot of troubles in order to make post hoc
comparison, specially in the case of Group. Does somebody know how to
perform post hoc comparisons when using GLM, if so I would really
appreciate it.

Thanks in advance for your help


(attached original data)

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