During a lunch with Rob Hyndman and Earo Wang last week in Melbourne, I was surprised to know that there still existed packages that did not use roxygen to write the R documentation (my greatest sympathy to those poor authors), and I was also pleasantly surprised that Rob knew and ... [Read more...]

It is always the little things… Over the years, I have been totally happy with almost everything about Github, but I have also been waiting for one little thing: I wish we could enclose text that contains N backticks with a pair of N + 1 backticks in Github issues/comments, i.... [Read more...]

I have used on.exit() for several years, but it was not until the other day that I realized a very weird thing about it: you’d better follow the default positions of its arguments expr and add, i.e., the first argument has to be expr and the second ... [Read more...]

A few months ago Jenny wanted me (and Karthik, if I remember correctly) to share some experience with GIFs. I have been busy with writing the blogdown book recently and don’t really have much time, so I’m going to write a quick post just to take a short ... [Read more...]

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I had misunderstood the function missing() for several years. Originally I thought it only applies to an argument that does not have a default or user-specified value. For example, this is fairly easy to understand: f = function(x) { missing(x) } f() # should be TRUE One day I was surprised to ... [Read more...]

Note: What other facts about Jeff Leek do you “know”? Please feel free to click the edit button above and submit a pull request on Github. I have not written blog posts for quite a while. It is not because I don’t have anything to write. On the contrary, ... [Read more...]

Note: What other facts about Jeff Leek do you “know”? Please feel free to click the edit button above and submit a pull request on Github, or tweet with the hashtag #jeffleekfacts. I have not written blog posts for quite a while. It is not because I don’t have ... [Read more...]