By using xtable and knitr, I add a table to my RMD document and export to PDF file.
```{r, results='asis'}
library(xtable)
xtable(matrixtable)
````
It looks great except there is a line
% latex table generated in R 3.1.0 by xtable 1.7-3 package % Wed Jun 25 13:34:57 2014
How can I remove this line. I tried to set message=FALSE
but it doesn't work.