I got a question about using a GLZ with categorical x categorical data.
Below there is a data set I want to know the influence of treatments (CONT,
and LPS2H LPS24H) on the categories of pigmentation of the right testis of
an amphibian. From these data, I used the function glm with binomial family
(logit). But in the result (see below) is not possible to know the influence
of the three treatments on the categories, only the treatments as a whole.
Could someone help me?
Thanks in advance
> td=read.table(file.choose(), h=T)
> td
Tratamento Categoria
1 CONT Cat.2
2 CONT Cat.2
3 CONT Cat.2
4 CONT Cat.2
5 CONT Cat.3
6 CONT Cat.3
7 CONT Cat.3
8 CONT Cat.3
9 CONT Cat.3
10 CONT Cat.3
11 LPS2h Cat.2
12 LPS2h Cat.2
13 LPS2h Cat.2
14 LPS2h Cat.3
15 LPS2h Cat.3
16 LPS2h Cat.3
17 LPS2h Cat.3
18 LPS2h Cat.3
19 LPS2h Cat.3
20 LPS2h Cat.3
21 LPS24h Cat.1
22 LPS24h Cat.1
23 LPS24h Cat.1
24 LPS24h Cat.1
25 LPS24h Cat.1
26 LPS24h Cat.2
27 LPS24h Cat.2
28 LPS24h Cat.2
29 LPS24h Cat.2
30 LPS24h Cat.2
> mod.test=glm(Categoria~Tratamento, family=binomial(logit), data=td)
> mod.test
Call: glm(formula = Categoria ~ Tratamento, family = binomial(logit),
data = td)
Coefficients:
(Intercept) TratamentoLPS24h TratamentoLPS2h
2.057e+01 -2.057e+01 1.558e-08
Degrees of Freedom: 29 Total (i.e. Null); 27 Residual
Null Deviance: 27.03
Residual Deviance: 13.86 AIC: 19.86
> anova(mod.test, test="Chisq")
Analysis of Deviance Table
Model: binomial, link: logit
Response: Categoria
Terms added sequentially (first to last)
Df Deviance Resid. Df Resid. Dev P(>|Chi|)
NULL 29 27.034
Tratamento 2 13.171 27 13.863 0.001380 **
---
Signif. codes: 0 *** 0.001 ** 0.01 * 0.05 . 0.1 1
>
--
Atenciosamente,
*Diogo Borges Provete*
==============================
Biólogo
Mestre em Biologia Animal (UNESP)
Laboratório de Ecologia Animal
Departamento de Zoologia e Botânica
Instituto de Biociências, Letras e Ciências Exatas
Universidade Estadual Paulista - UNESP
São José do Rio Preto-SP
Brazil
Rua Cristóvão Colombo, 2265
Jardim Nazareth - 15054-000
*Skype*: diogoprovete
*MSN*: [email protected]
*Personal web page <https://sites.google.com/site/diogoprovetepage/>*
Traduza conosco:
<<<American Journal Experts>>> <http://www.journalexperts.com/br/>
<<<D-Lang Soluções linguisticas<http://www.d-lang.com.br/site/sitept/index.htm>
>>>
==============================
--
Atenciosamente,
*Diogo Borges Provete*
==============================
Biólogo
Mestre em Biologia Animal (UNESP)
Laboratório de Ecologia Animal
Departamento de Zoologia e Botânica
Instituto de Biociências, Letras e Ciências Exatas
Universidade Estadual Paulista - UNESP
São José do Rio Preto-SP
Brazil
Rua Cristóvão Colombo, 2265
Jardim Nazareth - 15054-000
*Skype*: diogoprovete
*MSN*: [email protected]
*Personal web page <https://sites.google.com/site/diogoprovetepage/>*
Traduza conosco:
<<<American Journal Experts>>> <http://www.journalexperts.com/br/>
<<<D-Lang Soluções linguisticas<http://www.d-lang.com.br/site/sitept/index.htm>
>>>
==============================
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