[R] Draw a nomogram after glm

[Komine]

Hi,
I use datadist fonction in rms library  in order to draw my nomogram. After
reading, I try this code:
f<-lrm(Y~L+P,data=donnee)
f <- lrm(Y~L+P,data=donnee)
d <- datadist(f,data=donnee)
options(datadist="d")

f <- lrm(Y~L+P)          
summary(f,L=c(0,506,10),P=c(45,646,10))        
plot(Predict(f,L=200:800,P=3))
 
Unfortunately, I have error after the 2nd code:
Erreur dans datadist(f, data = donnee) : program logic error

Please could you provide me a document more simple which is more
understandable for new R user. 
Thanks for your help. 

Komine 


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