R help - Jul 2010 - Problem with offset (Glm or glmD) in Design library

Dear List

My question relates to the rms (or Design) package. I have modified the example
from help(Glm) to include an offset argument. It works with "glm" but
"Glm" gives the error

Error in if (!length(fname) || !any(fname == zname)) { : 
  missing value where TRUE/FALSE needed


# -- begin example
library(rms)
of <- 100:92

counts <- c(18,17,15,20,10,20,25,13,12)
outcome <- gl(3,1,9)
treatment <- gl(3,3)
f <- glm(counts ~ outcome + treatment, family=poisson(),offset=of)
f
anova(f)
summary(f)
f <- Glm(counts ~ outcome + treatment, family=poisson(),offset=of)
# -- end example

The same error occurs using glmD from the Design package.

I use R version 2.11.1 for Windows and have installed the "rms"
package together with Design and Hmisc.

Is this a bug or am I missing something?

Best regards,

Claus
----------------------------------------
Claus Dethlefsen, MSc, PhD
Biostatistician at Center for Cardiovascular Research
Aalborg Hospital, Aarhus University Hospital, Denmark

On 07/15/2010 07:59 AM, Claus Dethlefsen / Region Nordjylland
wrote:
> Dear List
>
> My question relates to the rms (or Design) package. I have modified
> the example from help(Glm) to include an offset argument. It works
> with "glm" but "Glm" gives the error
>
> Error in if (!length(fname) || !any(fname == zname)) { : missing
> value where TRUE/FALSE needed
>
>
> # -- begin example library(rms) of<- 100:92
>
> counts<- c(18,17,15,20,10,20,25,13,12) outcome<- gl(3,1,9)
> treatment<- gl(3,3) f<- glm(counts ~ outcome + treatment,
> family=poisson(),offset=of) f anova(f) summary(f) f<- Glm(counts ~
> outcome + treatment, family=poisson(),offset=of) # -- end example
That should be counts ~ outcome + treatment + offset(of)

Frank
>
> The same error occurs using glmD from the Design package.
>
> I use R version 2.11.1 for Windows and have installed the "rms"
> package together with Design and Hmisc.
>
> Is this a bug or am I missing something?
>
> Best regards,
>
> Claus ---------------------------------------- Claus Dethlefsen, MSc,
> PhD Biostatistician at Center for Cardiovascular Research Aalborg
> Hospital, Aarhus University Hospital, Denmark
>
> ______________________________________________ R-help at r-project.org
> mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do
> read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Frank E Harrell Jr   Professor and Chairman        School of Medicine
                      Department of Biostatistics   Vanderbilt University