[R] doubt on survreg.

[Ronaldo Reis Jr.]

Hi all,
I make a censored model using survreg from survival package. But the deviance 
values are too high, it is possible that must be a error in my model?

> summary(completo)
      conc          peso             dv              w               temp      
 Min.   :0.7   Min.   : 5.00   Min.   : 1.00   Min.   :0.0000   Min.   :22.70  
 1st Qu.:2.3   1st Qu.: 9.00   1st Qu.: 4.00   1st Qu.:0.0000   1st Qu.:24.20  
 Median :3.9   Median :11.00   Median :11.00   Median :0.0000   Median :25.00  
 Mean   :3.9   Mean   :11.21   Mean   :12.90   Mean   :0.2727   Mean   :25.22  
 3rd Qu.:5.5   3rd Qu.:13.00   3rd Qu.:22.25   3rd Qu.:1.0000   3rd Qu.:26.30  
 Max.   :7.1   Max.   :23.00   Max.   :29.00   Max.   :1.0000   Max.   :30.00  
      sp    
 Erato :66  
 Ethila:66  
            
> m0 <- survreg(Surv(dv,w)~1)
> m0
Call:
survreg(formula = Surv(dv, w) ~ 1)

Coefficients:
(Intercept) 
   3.268812 

Scale= 0.08118577 

Loglik(model)= -86.5   Loglik(intercept only)= -86.5
n= 132 
> m1 <- update(m0,.~. +sp+sp:conc+conc+peso+temp)
> m1
Call:
survreg(formula = Surv(dv, w) ~ sp + conc + peso + temp + sp:conc)

Coefficients:
  (Intercept)      spEthila          conc          peso          temp 
   6.16976497    0.47406628   -0.17860548    0.08421499   -0.16791187 
spEthila:conc 
  -0.07836046 

Scale= 0.0809617 

Loglik(model)= -1.088904e+40   Loglik(intercept only)= -86.5
	Chisq= -2.177807e+40 on 5 degrees of freedom, p= 1 
n= 132 
> 

Thanks for all and happy new year.
Ronaldo
-- 
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