[R] Get rid of the first row of the LaTeX table generated by xtable

[Shige Song]

Dear All,

I am trying to generate a LaTeX table from a small data frame using
xtable. I have three variable and 10 records. However, the resulted
LaTeX table has four columns (instead of three), of which the first
column seems to be an automatically generated ID. Is there a way to
get rid of this column?

Thanks.

Shige