<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div align="center"><div style="text-align: left;"><span style="background-color: transparent;">Boa tarde Pessoal,</span></div><div style="text-align: left;"><span style="background-color: transparent;"> Estou ajustando uma regressão logística e me deparei com a seguinte dúvida:</span></div><div style="text-align: left;"><span style="background-color: transparent;"> </span></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">###################################################################################################</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">#Regressão logística entre a proporção de herbívoros predados e a densidade
de herbívoros oferecidos</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">#</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">pred<-c(1,2,2,3,1,4,2,3,2,3,5,6,5,5,3,7,7,6,2</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">,3,15,12,14,12,11,11,11,13,13,13,18,14,27,26</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">,17,18,20,22,10,15,29,30,36,40,23,50,30,40,29,52)##Número de herbívoros predados</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">dens<-sort(rep(2^(2:6),10))#### Densidade de herbivoros oferecidos</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">##</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">##Regressão
pred/dens = exp(P0+P1*N+P2*N^2+P3*N3)/1+ exp(P0+P1*N+P2*N^2+P3*N3)</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">p.model1<-glm(pred/par~dens+I(dens^2)+I(dens^3),family="binomial")</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">summary(p.model1)</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">#</font></div><div style="text-align: start; color: rgb(0, 0, 0); font-size: 13px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><font face="arial, helvetica, sans-serif" size="2"><br></font></div><div style="text-align: start; color: rgb(0, 0, 0); font-size: 13px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><font face="arial, helvetica, sans-serif" size="2"><br></font></div><div style="text-align: start;"><font
face="arial, helvetica, sans-serif" size="2">Minha dúvida é se o coeficiente linear que aparece no summary esta transformado em exp(x)/1+exp(x)</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">ou trata-se do valor sem transformação?</font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2"><br></font></div><div style="text-align: start;"><font face="arial, helvetica, sans-serif" size="2">Obrigado,</font></div><div style="text-align: start; color: rgb(0, 0, 0); font-size: 13px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><font face="arial, helvetica, sans-serif" size="2"><br></font></div><div style="text-align: start; color: rgb(0, 0, 0); font-size: 13px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><font face="arial, helvetica, sans-serif" size="2"><pre
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Alexandre dos Santos
Proteção Florestal
IFMT - Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso - Campus Cáceres
Avenida dos Ramires, s/n
Bairro: Distrito Industrial
Cáceres - MT CEP: 78.200-000
Fone: (+55) 65 8132-8112 (TIM) (+55) 65 9686-6970 (VIVO)
<a class="moz-txt-link-abbreviated" href="mailto:e-mails:alexandresantosbr@yahoo.com.br">e-mails:alexandresantosbr@yahoo.com.br</a>
<a class="moz-txt-link-abbreviated" href="mailto:alexandre.santos@cas.ifmt.edu.br">alexandre.santos@cas.ifmt.edu.br</a>
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