[R] Datadist error

Frank Harrell f.harrell at vanderbilt.edu
Tue Apr 12 19:26:28 CEST 2011

Please follow posting guide and provide a simple completely self-contained
example showing the error.  Then I'll take a look.

Sander wrote:
> Dear all,
> I have performed a simple logistic regression using the lrm function from
> the Design library. Now I want to plot the summary, or make a nomogram. I
> keep getting a datadist error: options(datadist= m.full ) not created with
> datadist.
> I have tried to specify datadist beforhand (although I don't know why it
> should be done):
> ddist<-datadist(d)                ##where d is my dataset
> options(datadist="ddist")
> This doesn't work. It only works when I convert my original dataset to
> datadistL
> d<-datadist(d)
> options(datadist="d")
> After this I can perform all the diagnostics and make a nomogram. However,
> my dataset 'd' is now completely useless, and I have to run the code to
> read
> in my data again and again to perform actions that are not related to
> datadist. Please let me know what I am overlooking.
> This is some more of the code:
> m.full<-lrm(event~pa+pb+pc, x=TRUE, y=TRUE, data=d)
> stats<-m.full$stats
> hshrink<-(stats["Model L.R."]-stats["d.f."])/stats["Model L.R."]
> hshrink
> ddist<-datadist(d)
> options(datadist="ddist")
> par(mfrow=c(2,2))
> plot(m.fulldesign)                         ##Error I described
> f.sum<-summary(m.fulldesign)      ##Error I described
> nomogram(m.full)                        ##Error I described
> Best regards,
> Sander van Kuijk
> 	[[alternative HTML version deleted]]
> ______________________________________________
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.

Frank Harrell
Department of Biostatistics, Vanderbilt University
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