Progress Bars in R

Recently, I've had a lot of time consuming tasks running in R where it's nice to know how the computer is doing. I usually just output the name of the current iteration or a dot or something but I finally decided I should figure out how to make a nice progress bar in R. It turns out it's really simple since it's already builtin with the txtProgressBar function. So you can do something like:

R:
  1.  

A text progress bar in R

That's good enough for me but there's also winProgressBar for a fancy Windows progress bar and tkProgressBar (in the tcltk package) if you really want to get fancy.