[R] Post hoc ANCOVA
Thalita Gabriella Zimmermann
thalitagabriella at gmail.com
Sat Jun 13 18:13:23 CEST 2015
My name is Thalita, and I am a Phd student from Brasil.
I am trying to do a post hoc of ANCOVA to compare three slopes with Tukey test.
I am using:
#percentagem: dependent variable
#tratamento: factor
#tempo: covariate
#ANCOVA
ancova(percentagem~tratamento*tempo, data=data)
summary(ancova(percentagem~tratamento*tempo, data=data))
mod<-ancova(percentagem~tratamento*tempo,data=data)
glht(mod, linfct=mcp(tratamento="Tukey"))
summary(glht(mod, linfct=mcp(tratamento="Tukey"))) ## but I think that
# compare just the intercep
So, I would like to know how can compare the three slopes.
I saw this page in internet
(https://stat.ethz.ch/pipermail/r-help/2012-February/303327.html), but
I did't understood how to compare.
Thankk you
Kind Regards
--
*Thalita Gabriella ZimmermannBióloga, MSc.*
*Doutoranda em Botânica *
*Laboratório de Sementes - DIPEQInstituto de Pesquisas Jardim Botânico do
Rio de Janeiro*
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