The initialization code merely sets some options for later use and has no real output. We will just print "Hello World" to make sure that it is working:
options(digits=3) options(repr.plot.width = 1000, repr.plot.height = 500, repr.plot.res = 144, repr.plot.pointsize = 5) rep_times=1000 cat("Hello World")
The output cell prints Hello World and also gives you the time it took to run, the username, time and time, as well as the cluster it ran on. Pay close attention to the length of time that each code chunk ran. It will be useful for benchmarking code at a later date.