Talk:Algorithms for calculating variance: Difference between revisions

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:Well, algorithms I and III only scan the list of data once, whereas both versions of algorithm II scan it twice. Hence, since I/O is by several orders of magnitude slower than calculations, that means that, unless the whole data set is read into memory, algorithm II will be twice as slow, and it won't work if the data file is not seekable. --[[User:Army1987|Army1987]] 16:00, 28 October 2007 (UTC)
 
 
 
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=== Algorithm IV ===