[not] Le Monde puzzle (solution)

April 13, 2012 | xi'an

Following the question on dinner table permutations on StackExchange (mathematics) and the reply that the right number was six, provided by hardmath, I was looking for a constructive solution how to build the resolvable 2-(20,5,1) covering. A few hours later. hardmath again came up with an answer, found in the ... [Read more...]

Popular topics at the BioStar Q&A site

August 23, 2011 | nsaunders

Which topics are the most popular at the BioStar bioinformatics Q&A site? One source of data is the tags used for questions. Tags are somewhat arbitrary of course, but fortunately BioStar has quite an active community, so “bad” tags are usually edited to improve them. Hint: if your question ... [Read more...]

CrossValidated Journal Club

December 21, 2010 | Rob J Hyndman

Journal Clubs are a great way to learn new research ideas and to keep up with the literature. The idea is that a group of people get together every week or so to discuss a paper of joint interest. This can happen within your own research group or department, or ... [Read more...]

CrossValidated launched!

November 4, 2010 | Rob J Hyndman

The CrossValidated Q&A site is now out of beta and the new design and site name is live. New design The new design looks great, thanks to Jin Yang, our designer-in-residence. Note the normal density icon for accepted answers and the site icon depicting a 5-fold cross-validation (light green ...
[Read more...]

How to avoid annoying a referee

October 22, 2010 | Rob J Hyndman

It’s not a good idea to annoy the referees of your paper. They make recommendations to the editor about your work and it is best to keep them happy. There is an interesting discussion on on this subject. This inspired my own list below. Explain what ... [Read more...]

Happy World Statistics Day!

October 19, 2010 | Rob J Hyndman

The United Nations has declared today “World Statistics Day”. I’ve no idea what that means, or why we need a WSD. Perhaps it is because the date is 20.10.2010 (except in North America where it is 10.20.2010). But then, what happens from 2013 to 2099? And do we just forget the whole idea ... [Read more...]

What should we call the stats Q&A site?

September 18, 2010 | Rob J Hyndman

The Q&A site at has been steaming ahead with loads of good questions and answers. We are currently trying to select a name and not many people have voted. Although we have more than 1300 users of the site, less than 40 people have currently voted on the ...
[Read more...]

Statistical Analysis StackExchange site now available

July 26, 2010 | Rob J Hyndman

The Q&A site for statistical analysis, data mining, data visualization, and everything else to do with data analysis has finally been launched. Please head over to and start asking and answering questions. Also, spread the word to everyone else who may be interested — work colleagues, students, ...
[Read more...]

More StackExchange sites

July 16, 2010 | Rob J Hyndman

The StackExchange site on Statistical Analysis is about to go into private beta testing. This is your last chance to commit if you want to be part of the private beta testing. Don’t worry if you miss out — it will only be a week before it is then open ...
[Read more...]

Stack exchange for statistical analysis needs you!

June 17, 2010 | Rob J Hyndman

The proposal to create a StackExchange site for statistical analysis is steadily moving forward. We have now completed the scoping stage which involved finding enough people willing to express an interest in the idea, and voting on some example questions to define what is allowed and what is not allowed ...
[Read more...]

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