Ross Ikaha (via Xi'an -- thanks ;) ) gives a nice example to show why R is basically impossible to optimize: > f = function() { > if (runif(1) > 0.5) { > x = 10 > } > ...

Ross Ikaha (via Xi'an -- thanks ;) ) gives a nice example to show why R is basically impossible to optimize: > f = function() { > if (runif(1) > 0.5) { > x = 10 > } > ...

Tamino over at Open Mind has a new post detailing his approach for calculating temperature averages. See his post here. His method is based on the Berkeley method as he notes and he uses it primarily for calculating regional or local temperature averages. Read his post for the math details behind the approach. I got

If a particular prediction comes true, how surprised should we be? The prediction The page that sparked my curiosity tells of a prediction made a year ago that the S&P 500 would beat its historic high by the end of 2011. It says that at the point the prediction was made, the level of the … Continue reading...

As a fact-based blog, the posts here contain very often diagrams and data tables. To enable you to reproduce the results and insights, I include the computations as computer code.Most blogposts I write are markdown text combined (or weaved) with computer code written in the R language. I created a small package mdtools that puts the...

Today a lot of great mails arrived at my inbox. In one of them I was reading I’ve just added your feed to the site. Where did this mail come from? The sender of the email was Tal Galili. He is a researcher in BioStatistics at the Tel Aviv University, very active around the internet.

e-mails with the latest R posts.

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