[R] Draw a nomogram after glm

[Komine]

Hi all R users 
I did a logistic regression with my binary variable Y (0/1) and 2
explanatory variables.
Now I try to draw my nomogram with predictive value. I visited the help of R
but I have problem to understand well the example. When I use glm fonction,
I have a problem, thus I use lrm. My code is: 
modele<-lrm(Y~L+P,data=donnee)
fun<- function(x) plogis(x-modele$coef[1]+modele$coef[2])
f <- Newlabels(modele,c(L="poids",P="taille"))  
nomogram(f, fun=list('Prob Y<=1'=plogis), 
 fun.at=c(seq(0,1,by=.1),.95,.99),
         lmgp=.1, cex.axis=.6)
         fun.at=c(.01,.05,seq(.1,.9,by=.1),.95,.99),
         lmgp=.2, cex.axis=.6)
options(Fire=NULL)
Result is bad and I have this following error message:
Erreur dans value.chk(at, i, NA, -nint, Limval, type.range = "full") : 
  variable L does not have limits defined by datadist

Could you help me on the code to draw nomogram. 
Nb: my English is low, I apologize.
Thank for your help
Komine 
 


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