using GAM to assess the linearity in logistic regression
I am a little confused about what you asked. If you want to assess the linearity in logistic regression, why do you want to use GAM instead of GLM? As far as I understand, GAM is used to capture nonlinearity rather linearity. Am I right here?
On Apr 1, 2005 10:19 PM, ronggui <0034058 at fudan.edu.cn> wrote:
as agresti(2002) points out that we had better to screen the data to see if the the logit(pi) and the predictor has linear realtionship in logistic regressin.and i find some materials in MASS and the refernce of s-plus.but it is a bit simple and i can not exactly master the means to assess the linearity in logistic regression. so anyone suggest some materials? i am not familiar with GAM,but i think thers maybe some materials can let me use GAM to assess the linearity in logistic regression without master GAM model. is it right? thank you!
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WenSui Liu, MS MA Senior Decision Support Analyst Division of Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center