R help - Oct 2010 - trouble with \textless in Hmisc latex() on a drop1 object

Yes, it's homework . . . delete now if desired . . . but I think it is an
interesting problem.

Running R 2.11.1, LaTeX on WinXP, via Sweave.

A drop1() object from a glm() produces, as part of its output, a string that
looks like this:

<none>

The trouble I run into is  that running latex() on a drop1() object from
glm() produces a string that looks like this in the generated .tex file:

\textlessnone\textgreater

This gives an "undefined control sequence" error when compiling  the
.tex
file. I can just <ENTER> past the error, but the resulting .pdf file
contains just a greater-than symbol in the table where <none> is supposed
to
appear.

If I go into the .tex file and manually insert a space, changng it to

\textless none\textgreater

the document compiles fine.

Reproducile example below. Any suggestions?

Thanks.
Chris Ryan
SUNY Upstate Medical University Binghamton Clinical Campus

\documentclass{article}
\begin{document}

<<options, echo=FALSE, hide=TRUE>>options(SweaveSyntax =
"SweaveSyntaxNoweb")
library(Hmisc)
@

<<code>>salmon <- data.frame(cbind(c(rep(0,49),rep(1,51)),
rnorm(100), rnorm(100)))
names(salmon) <-
c("country","freshwater","marine")
model1 <- glm(country~freshwater+marine, family="binomial",
data=salmon)
summary(model1)
model1r <- round(drop1(model1),3)
@

Here is some problem code.

<<problemcode, results=tex>>latex(model1r, file="",
caption="signficance of individual predictors")
@

\end{document}

	[[alternative HTML version deleted]]

On 21/10/2010 9:21 PM, Christopher W Ryan wrote:
> Yes, it's homework . . . delete now if desired . . . but I think it is
an
> interesting problem.
Looks like a simple bug in Hmisc, leaving out that space.  I'd grab a 
copy of the source, fix it, and send a patch to the maintainer (Charles 
Dupont <charles.dupont at vanderbilt.edu>, who is cc'd).  Or, if you
don't
know how to do that, just write to the maintainer.  Your example should 
be sufficient for him to find and fix it.  But then you'll have to wait 
until he has time...

Duncan Murdoch
>
> Running R 2.11.1, LaTeX on WinXP, via Sweave.
>
> A drop1() object from a glm() produces, as part of its output, a string
that
> looks like this:
>
> <none>
>
> The trouble I run into is  that running latex() on a drop1() object from
> glm() produces a string that looks like this in the generated .tex file:
>
> \textlessnone\textgreater
>
> This gives an "undefined control sequence" error when compiling 
the .tex
> file. I can just<ENTER>  past the error, but the resulting .pdf file
> contains just a greater-than symbol in the table where<none>  is
supposed to
> appear.
>
> If I go into the .tex file and manually insert a space, changng it to
>
> \textless none\textgreater
>
> the document compiles fine.
>
> Reproducile example below. Any suggestions?
>
> Thanks.
> Chris Ryan
> SUNY Upstate Medical University Binghamton Clinical Campus
>
> \documentclass{article}
> \begin{document}
>
> <<options, echo=FALSE, hide=TRUE>>> options(SweaveSyntax =
"SweaveSyntaxNoweb")
> library(Hmisc)
> @
>
> <<code>>> salmon<-
data.frame(cbind(c(rep(0,49),rep(1,51)), rnorm(100), rnorm(100)))
> names(salmon)<-
c("country","freshwater","marine")
> model1<- glm(country~freshwater+marine, family="binomial",
data=salmon)
> summary(model1)
> model1r<- round(drop1(model1),3)
> @
>
> Here is some problem code.
>
> <<problemcode, results=tex>>> latex(model1r,
file="", caption="signficance of individual predictors")
> @
>
> \end{document}
>
> 	[[alternative HTML version deleted]]
>
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