R help - Dec 2008 - Question about the rgroup option in Hmisc latex function

Is there a way to use the rgroup option without creating horizontal
rules separating the groups?

For example, say I have the following matrix containing sample sizes,
means, and standard deviations, for three groups of male and female
participants:
> descriptives
       n   Mean    SD
Male   "2" "0.703" "-0.809"
Female "3" "0.533" "-0.376"
Male   "2" "2.097" "-0.534"
Female "3" "0.843" " 0.966"
Male   "2" "0.350" " 0.149"
Female "3" "0.685" " 0.600"

I try typesetting the table with
> latex(descriptives, title="", file="",
label="tab:descript", ctable=TRUE, caption="Means and standard
deviations by condition and sex", colheads=c("Condition",
"n", "Mean", "SD"), rgroup=c("One",
"Two", "Three"))
which results in

\ctable[ caption={Means and standard deviations by condition and sex},
label=tab:descript, pos=!tbp, ]{llll} {}
{\FL\multicolumn{1}{l}{Condition}&
\multicolumn{1}{c}{n}&
\multicolumn{1}{c}{Mean}&
\multicolumn{1}{c}{SD}
\ML
{\bfseries One}&&&\NN
~~Male&2&0.703&-0.809\NN
~~Female&3&0.533&-0.376
\ML
{\bfseries Two}&&&\NN
~~Male&2&2.097&-0.534\NN
~~Female&3&0.843& 0.966
\ML
{\bfseries Three}&&&\NN
~~Male&2&0.350& 0.149\NN
~~Female&3&0.685& 0.600
\LL
}

but I want

\ctable[ caption={Means and standard deviations by condition and sex},
label=tab:descript, pos=!tbp, ]{llll} {}
{\FL\multicolumn{1}{l}{Condition}&
\multicolumn{1}{c}{n}&
\multicolumn{1}{c}{Mean}&
\multicolumn{1}{c}{SD}
\ML
{\bfseries One}&&&\NN
~~Male&2&0.703&-0.809\NN
~~Female&3&0.533&-0.376\NN
{\bfseries Two}&&&\NN
~~Male&2&2.097&-0.534\NN
~~Female&3&0.843& 0.966\NN
{\bfseries Three}&&&\NN
~~Male&2&0.350& 0.149\NN
~~Female&3&0.685& 0.600
\LL
}

i.e, I want the horizontal rules separating the row groups omitted.
Can this be done?

Thanks,
Ista

Hi Ista,

I think you looking for: n.rgroup?  See help(latex).

Also, try posting your example in a copy and past form, like:

descriptives<-data.frame(n=..., mean=...)  etc.

The easier it is for others to reproduce your initial results the  
quicker the problem will be solved.

HTH,

Jon Loehrke
Graduate Research Assistant
Department of Fisheries Oceanography
School for Marine Science and Technology
University of Massachusetts
200 Mill Road, Suite 325
Fairhaven, MA 02719