crossvalind
in [Matlab]
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From: sara on 10 May 2010 08:34 Hi, In the Help example, the crossvalind.m is used once outside the for loop. What exactly does Indices contain, the result for one partitioning or the average of K iterations? Do I need to call crossvalind inside a for loop in order to esure that "This process is repeated K times, leaving one different fold for evaluation each time"?
From: Tom Lane on 11 May 2010 17:15 > In the Help example, the crossvalind.m is used once outside the for loop. > What exactly does Indices contain, the result for one partitioning or the > average of K iterations? Just take a look: load fisheriris indices = crossvalind('Kfold',species,10); You'll see that it's a numeric vector containing the fold number assigned to each row. > Do I need to call crossvalind inside a for loop in order to esure that > "This process is repeated K times, leaving one different fold for > evaluation each time"? By leaving it outside the loop you insure that the assignment of rows to folds doesn't change. So then when you leave out one fold at a time in the loop, you're leaving out each observation exactly once. -- Tom
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