[R] Append to outfile in R CMD BATCH mode

[Turchin, Michael]

Is there a way to append to the outfile when using R CMD BATCH? My code, right now, is:

R CMD BATCH --slave --vanilla '--args place .2 -.1 .9 .6' StratificationSimulation example.output

Everything else is working the way I'd like it. The first few lines of code of my script file are:

options(echo=FALSE)
cmd_args = commandArgs()
print (cmd_args)
#d <- read.table("/dev/stdin")

if that helps any. However, I cannot currently change the output to append, rather than override, the designated outfile. Maybe I could potentially use sink(__, append=TRUE) if I could somehow reference the outfile from within the script (and assuming my understanding of sink() is correct)?

Any thoughts, or help? They're all greatly appreciated.
Thanks!
~Michael
Children's Hospital Boston
The Broad Institute