So, I downloaded the source files of Hmisc and changed in the file latex.s line 
688 'rotate' to 'sideways'. This does the work for landscape ctables in Latex. 

I also wrote an email to the package maintainer. I consider this thread as 
solved. 


Best

Simon

On Jul 26, 2013, at 5:34 PM, Simon Zehnder <szehn...@uni-bonn.de> wrote:

> Dear R-Users and R-Devels,
> 
> I may have found a deprecated option for the 'latex' function in the Hmisc 
> package. I am working with Hmisc and knitr and tried the following code:
> 
> \documentclass{article}
> \usepackage[utf8]{inputenc}
> \usepackage{amsmath, amssymb}
> \usepackage{ctable}
> %\usepackage{booktabs}
> \begin{document}
> <<results = 'asis'>>=
> library(Hmisc)
> iris.t <- head(iris)
> iris.t[seq(2, NROW(iris.t), by = 2),] <- format(iris.t[seq(2, NROW(iris.t), 
> by = 2),], scientific = TRUE)
> texMat <- matrix("", ncol = 5, nrow = 6)
> texMat[seq(2,nrow(texMat), by = 2), ] <- "scriptsize"
> latex(iris.t, 
> file = '', 
> landscape = TRUE,
> dcolumn = TRUE,
> col.just = c('r','c', 'r','c', 'l'),
> cdec = c(0, 0, 1, 1, 0),
> na.blank = TRUE,
> rowname = '',
> rowlabel = '', 
> cellTexCmd = texMat,
> ctable = TRUE, 
> cgroup = c('Observations', ''),
> n.cgroup = c(4, 1),
> rgroup = c('',''),
> n.rgroup = c(3, 3),
> caption = 'iris'
> )
> @
> \end{document}
> 
> Everything runs fine but the 'landscape' option. It says in the help for 
> 'latex' that if option 'ctable' is set to TRUE the 'rotate' option for ctable 
> is used if 'nadscape' is set TRUE. Looking at the ctable documentary 
> (http://texdoc.net/texmf-dist/doc/latex/ctable/ctable.pdf) in section Change 
> History, I get for version v1.07: General: Added option sideways, option 
> rotate now obsolete. Hasn't this been updated in the Hmisc package?
> 
> Best
> 
> Simon
> 
> ______________________________________________
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