R: directing output to file on the fly, output flushing

To start sending all output to a file, do this:

sink("path/to/filename") # Direct all output to file
print("Hi there") # Will be printed to file
sink() # Turn off buffing to file

Related to this I recently had to use:


This forces your console to print out any buffered content. Doing this will cost time, but if you are running a very long script and wonder if it is still alive, you might do something like this:

for(i in 10000:20000) { 
	# Find the i'th prime number
	# Are we still alive?
	cat("."); flush.console()

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