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More useless statistics
Over at the ExploringDataBlog, Ron Pearson just wrote a post about the cases when means are useless. In fact, it’s possible to calculate a whole load of stats on your data and still not really...
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A quick primer on split-apply-combine problems
I’ve just answered my hundred billionth question on Stack Overflow that goes something like I want to calculate some statistic for lots of different groups. Although these questions provide a steady...
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A little Christmas Present for you
Here’s an excerpt from my chapter “Blood, sweat and urine” from The Bad Data Handbook. Have a lovely Christmas! I spent six years working in the statistical modeling team at the UK’s Health and...
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user2013: The caret tutorial
This afternoon I went to Max Kuhn’s tutorial on his caret package. caret stands for classification and regression (something beginning with e) trees. It provides a consistent interface to nearly 150...
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