Roland,
I did a google search for
R Error: inner loop 2; cannot correct step size
and found an old R-help message that suggests the glm() algorithm cannot
converge.
https://stat.ethz.ch/pipermail/r-help/2009-December/223142.html
I get the same error message as you when I fit
glm(cbind(resp,nresp)~d+I(d^2)+I(d^3),data=test,family=
binomial(clog()))
but no error message if I get rid of the last parameter
glm(cbind(resp,nresp)~d+I(d^2),data=test,family=binomial(clog()))
Hope this helps
Jean
On Fri, May 23, 2014 at 7:13 AM, Roland Deutsch <roland.deut...@tuwien.ac.at
> wrote:
> Dear R-help,
>
> during a simulation study using glm, I got the following error message
> for which I cannot determine the cause:
>
> Error: inner loop 2; cannot correct step size
>
> Below is the code for which this error occurred is
>
> clog<-function(){
> linkfun<-function(mu) qexp(mu)
> linkinv<-function(eta) pmax(.Machine$double.eps,pexp(eta))
> mu.eta<-function(eta) pmax(dexp(eta),.Machine$double.eps)
> valideta<-function(eta) all(eta>0)
> link<-"clog"
>
>
> structure(list(linkfun=linkfun,linkinv=linkinv,mu.eta=mu.eta,valideta=valideta,name="link"),class="link-glm")
> }
>
> test<-data.frame(d=c(0,0.04,0.2,0.6,2,4),resp=c(0,1,3,4,24,28),nresp=c(18,21,19,17,1,0))
> glm(cbind(resp,nresp)~d+I(d^2)+I(d^3),data=test,family=binomial(clog()))
>
> Any help on why this error occurs and, more importantly, how I can
> filter data producing this error would be highly appreciated.
>
> Sincerely,
> Roland Deutsch
>
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>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
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>
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