Wednesday, November 28, 2012

Correlation coefficients as angles

Harry Altman has an interesting piece over at Less Wrong suggesting that it makes more sense to think of correlation coefficients as angles. To many people a correlation coefficient is nothing more than a number between -1 and 1 which shows in some easy to quantify but hard to intuit way of how related two variables are. Harry's suggestion gives a useful way of thinking about them and is worth a read.