[R] Draw a nomogram after glm

[Frank Harrell]

Please read the documentation for the rms package, particularly the datadist
function.

Note that in your subject line glm should be lrm.

Frank


Komine wrote:
> 
> 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
> 


-----
Frank Harrell
Department of Biostatistics, Vanderbilt University
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