How many different ways are there to create an identity matrix in R? This was an interesting little challenge set by Guillaume Nicoulaud on Twitter. Find as many way you can to create the identity matrix with #rstats. pic.twitter.com/HlhIM6mSrx— Guillaume Nicoulaud (@ordrespontane) February 3, 2018 In code golf, programmers try to write an algorithm using the shortest programme possible, often exploiting lesser-known...