[R] ob.step$anova interpretation

[orkun]

hello

I built logistic regression model.
To model check I used stepAIC. But I don't know how it
is interpreted . I could not any find any explanation about it
For instance which model is preferable ? What are the critarias
to choose beter model

I will appreciate if you give me an explanation ?

models
---------

 > lo1.step$anova
Stepwise Model Path
Analysis of Deviance Table

Initial Model:
res ~ as.factor(jeo) + as.factor(eg) + as.factor(ys) + as.factor(yy) +
    as.factor(ak)

Final Model:
res ~ as.factor(jeo) + as.factor(eg) + as.factor(ys) + as.factor(yy) +
    as.factor(ak)


  Step Df Deviance Resid. Df Resid. Dev      AIC
1                        788   30604.46 31588.77
~~~~~~~~~~
 > lo2.step$anova
Stepwise Model Path
Analysis of Deviance Table

Initial Model:
res ~ as.factor(jeo):as.factor(eg) + as.factor(ys) + as.factor(yy) +
    as.factor(ak)

Final Model:
res ~ as.factor(ys) + as.factor(yy) + as.factor(ak)


                            Step Df Deviance Resid. Df Resid. Dev        AIC
1                                                  728 3123352.66 3124456.98
2 - as.factor(jeo):as.factor(eg) 76  3052176       804   71176.54   72128.85


kind regards

-- 
Ahmet Temiz
Jeoloji Müh.
Afet İşleri Genel Müdürlüğü
Deprem Araştırma Dairesi
Tel: (312) 287 89 51 veya (312) 287 26 80/1547
Faks: (312) 287 89 51
E. Posta: temiz at deprem.gov.tr
 www.deprem.gov.tr

Ahmet Temiz
Geological Eng.
General Directorate of Disaster Affairs
Earthquake Research Department
Phone: +90 (312) 287 89 51 or (312) 287 26 80/1547
Fax: +90 (312) 287 89 51
E. Mail: temiz at deprem.gov.tr
www.deprem.gov.tr


-- 
This message has been scanned for viruses and\ dangerous con...{{dropped}}