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.
The inclusion of the comment in the final table is defined by the comment argument to print.xtable
the default value for this is getOption('xtable.comment',TRUE).
so, if you set
options(xtable.comment = FALSE)
then for any future tables this comment will not produced.
You can put in directly in the print statement like so:
xtb=xtable(...)
print(xtb, comment=FALSE)
来源：https://stackoverflow.com/questions/24400308/how-to-remove-the-lines-in-xtable-table-output-by-knitr