Writes a `pbat' object (the result of calling pbat.m) to disk.
write.pbat(x, filename, resultsOnly=FALSE)
write.pbat.csv(x, filename, resultsOnly=FALSE)
Object of class pbat.
Filename to save to.
When TRUE, this only prints the results to file, and not how the function was called. Typically not used.
With write.pbat, a text file is written out with an `&' symbol
  delimiting the output section. Both the calling and results section are
  preserved. If the file has the `.csv' extension, then
  write.pbat.csv is called.
With write.pbat.csv, the text file is of the standard `csv'
  format to delimit the text file. This should be readable with any
  spreadsheet program. Note that to use the R output (for the logrank
  plots), you should open the file in a spreadsheet program and just
  copy and paste it into R.