[R] xtable and column headings

[Richard M. Heiberger]

I would use latex() in the Hmsic package.  Here is a short example

tmp <- matrix(1:12,4)
library(Hmisc)
tmp.latex <- latex(tmp, colheads=c("abc$_1$","def$^{12}_4$","$g\\times h$"))
## note the escaped "\" in the above colheads vector
print.default(tmp.latex)

Copy the contents of the file referenced in tmp.latex to your
real myfile.tex file.

There are about a zillion optional arguments to latex() that give you very fine
control over the appearance of the typeset object.  See ?latex