[R] problems with bootstrapping (Divergence or singularity ???)

From: Christian Jones <ccatj_at_web.de>
Date: Sun 26 Feb 2006 - 10:18:02 EST

while bootstrapping my fitted model for an internal validation:

fit<-lrm(y~a+b+c ,x=T,y=T)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

val<-validate.lrm(fit,B=300,bw=T,rule="aic")

 R brings the notice that in some cases of the iterative process no variable has been choosen for estimation("Divergence or singularity in 129 samples"). I canīt quite figure out why and what this means for my goodness of fit

Someone know more?

best regards

chris         

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