On 04.10.2011 13:30, Peter Minting wrote:
Dear R-help
Can anyone tell me why my curve appears the wrong way round on a rug plot?
I am using the same code as on pg 596 of the Crawley R-book.
mod<-glm(mort~logBd,binomial)
What is mort, what is logBd? I don't have access to the book. I have
hidden it in my other office so that nobody can find it anymore.
par(mfrow=c(2,2))
xv<-seq(0,8,0.01)
yv<-predict(mod,list(logBd=xv),type="response")
plot(logBd,mort)
lines(xv,yv)
I've tried swapping xv and yv around but no luck.
Hopefully mort is a binary factor, i.e. with two levels. I that case
they are at positions 1 and 2 on the y axis in plot().
yv is the reponse, i.e. is in the interval (0,1) if the binomial glm was
successful. So a different scale.
So I guess
lines(xv,yv+1)
could help.
Whatelse I think about "The R Book" can be found in my book review
published in "Statistical Papers".
Best,
Uwe Ligges
Thanks,
Pete
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