Comments on: Naïve Bayes in Hadoop http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/ Just another WordPress weblog Thu, 29 Jul 2010 12:51:05 +0000 http://wordpress.org/?v=2.7 hourly 1 By: Nick http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/comment-page-1/#comment-1481 Nick Tue, 17 Nov 2009 22:47:04 +0000 http://nickjenkin.com/blog/?p=85#comment-1481 @Cliff Thanks, however you may want to check out Knuths std dev function as it more accurate http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance On-line algorithm @Cliff
Thanks, however you may want to check out Knuths std dev function as it more accurate

http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance

On-line algorithm

]]> By: Nick http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/comment-page-1/#comment-1480 Nick Tue, 17 Nov 2009 22:45:20 +0000 http://nickjenkin.com/blog/?p=85#comment-1480 Also note, while this looks like python it is pseudo code. Also note, while this looks like python it is pseudo code.

]]> By: Nick http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/comment-page-1/#comment-1479 Nick Tue, 17 Nov 2009 22:44:46 +0000 http://nickjenkin.com/blog/?p=85#comment-1479 Hi The collect function is provided by Hadoop -Nick Hi
The collect function is provided by Hadoop
-Nick

]]> By: Petro http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/comment-page-1/#comment-1478 Petro Tue, 17 Nov 2009 18:52:26 +0000 http://nickjenkin.com/blog/?p=85#comment-1478 Hi, where did the 'collect' function come from? Thanks, Petro Hi,

where did the ‘collect’ function come from?

Thanks,
Petro

]]> By: Cliff Moon http://nickjenkin.com/blog/2009/04/naive-bayes-in-hadoop/comment-page-1/#comment-1476 Cliff Moon Sun, 15 Nov 2009 00:34:29 +0000 http://nickjenkin.com/blog/?p=85#comment-1476 Just to let you know your standard deviation calculation is incorrect. It should be: sqrt(abs(sumSq - mean * mean) / count) Just to let you know your standard deviation calculation is incorrect. It should be:

sqrt(abs(sumSq - mean * mean) / count)

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