Overwrite current output in the R console

Question

I have been playing around with the R function txtProgressBar(). How can I hijack the function\'s ability to overwrite the current output in the console?

i.e. the p

Answer 1

I do not think overwriting is possible on the console. There is no backspace escape sequence. The progress bar can be drawn because the cat function will not emit a cr unless told to do so.

Edit: I was wrong. The backspace character is recognized:

for (i in 1:1000) {
     cat(as.character(Sys.time())) 
     flush.console() 
     for(i in 1:19) {cat("\8")} }