I have found that I like having my captions and labels in my latex document
rather than having them contained in my xtable output file (I haven't fully
gone to sweave yet).  I know I can do something like this by using the
'only.contents' argument in xtable.  Unfortunately, the only.contents
argument also removes the \begin{tabular}{rrrrrr} & \end{tabular} (in the
example below) of the table.    This means that I have to go look up each
table to determine the number of columns.

Is there a more automated way that I am missing? i.e only.contents but with
tabular headers (but not \begin{table})?
Thank you.

CODE:

## Demonstrate include.rownames, include.colnames,
## only.contents and add.to.row arguments
set.seed(2345)
res <- matrix(sample(0:9, size=6*9, replace=TRUE), ncol=6, nrow=9)
xres <- xtable(res)
digits(xres) <- rep(0, 7)
addtorow <- list()
addtorow$pos <- list()
addtorow$pos[[1]] <- c(0, 2)
addtorow$pos[[2]] <- 4
addtorow$command <- c('\vspace{2mm} \n', '\vspace{10mm} \n')
print(xres, add.to.row=addtorow, include.rownames=FALSE,
include.colnames=TRUE, only.contents=TRUE, hline.after=c(0, 0, 9, 9))


Output (only.contents=TRUE)
% latex table generated in R 2.13.2 by xtable 1.6-0 package
% Fri Oct 28 11:38:10 2011
1 & 2 & 3 & 4 & 5 & 6 \\
  space{2mm}
 \hline
\hline
1 & 7 & 6 & 6 & 5 & 9 \\
  1 & 1 & 1 & 5 & 7 & 7 \\
   space{2mm}
7 & 3 & 9 & 8 & 0 & 5 \\
  0 & 0 & 4 & 1 & 5 & 2 \\
   space{10mm}
4 & 1 & 8 & 5 & 7 & 1 \\
  2 & 4 & 5 & 9 & 5 & 4 \\
  6 & 3 & 3 & 5 & 5 & 8 \\
  7 & 6 & 1 & 0 & 7 & 6 \\
  4 & 4 & 8 & 8 & 3 & 2 \\
   \hline
\hline

Output (only.contents=FALSE)

% latex table generated in R 2.13.2 by xtable 1.6-0 package
% Fri Oct 28 11:39:23 2011
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrrrrr}
 1 & 2 & 3 & 4 & 5 & 6 \\
  space{2mm}
 \hline
\hline
1 & 7 & 6 & 6 & 5 & 9 \\
  1 & 1 & 1 & 5 & 7 & 7 \\
   space{2mm}
7 & 3 & 9 & 8 & 0 & 5 \\
  0 & 0 & 4 & 1 & 5 & 2 \\
   space{10mm}
4 & 1 & 8 & 5 & 7 & 1 \\
  2 & 4 & 5 & 9 & 5 & 4 \\
  6 & 3 & 3 & 5 & 5 & 8 \\
  7 & 6 & 1 & 0 & 7 & 6 \\
  4 & 4 & 8 & 8 & 3 & 2 \\
   \hline
\hline
\end{tabular}
\end{center}
\end{table}

	[[alternative HTML version deleted]]

