Sorry, when I wrote the comment I was on my Iphone and didn't check the website. I just did. I see what you mean. Why don't you just aggregate total click dat

Sorry, when I wrote the comment I was on my Iphone and didn't check the website. I just did. I see what you mean. Why don't you just aggregate total click data and see which articles get clicked the most, bin the results to categories (5,4,3,2,1) by topic then compute Pearson? SVM still sounds a bit heavy weight. Sure, I guess it'll handle a few thousand...how about 1-10 million? And how do you know if SVM is the most accurate? What's your criteria?