Re: [R] how to get inflection point in binomial glm

2011-12-02 Thread Rubén Roa
Enviado el: jueves, 01 de diciembre de 2011 20:34 Para: David Winsemius CC: r-help Help Asunto: Re: [R] how to get inflection point in binomial glm Thanks David and Rubén! @David: indeed 15 betas I forgot the interaction terms, thanks for correcting! @Rubén: the re-parameterize would be done

Re: [R] how to get inflection point in binomial glm

2011-12-01 Thread René Mayer
Thanks David and Rubén! @David: indeed 15 betas I forgot the interaction terms, thanks for correcting! @Rubén: the re-parameterize would be done within nls()? how to do this practically with including the factor predictor? and yes, we can solve within each group for Y=0 getting 0=b0+b1*X |

Re: [R] how to get inflection point in binomial glm

2011-12-01 Thread David Winsemius
On Dec 1, 2011, at 8:24 AM, René Mayer wrote: Dear All, I have a binomial response with one continuous predictor (d) and one factor (g) (8 levels dummy-coded). glm(resp~d*g, data, family=binomial) Y=b0+b1*X1+b2*X2 ... b7*X7 Dear Dr Mayer; I think it might be a bit more complex than tha

Re: [R] how to get inflection point in binomial glm

2011-12-01 Thread Rubén Roa
d the predictor at 95% probability, respectively. HTH Rubén -Mensaje original- De: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] En nombre de René Mayer Enviado el: jueves, 01 de diciembre de 2011 14:25 Para: r-help@r-project.org Asunto: [R] how to get inflection poi

[R] how to get inflection point in binomial glm

2011-12-01 Thread René Mayer
Dear All, I have a binomial response with one continuous predictor (d) and one factor (g) (8 levels dummy-coded). glm(resp~d*g, data, family=binomial) Y=b0+b1*X1+b2*X2 ... b7*X7 how can I get the inflection point per group, e.g., P(d)=.5 I would be grateful for any help. Thanks in advance