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Old 10-26-2005, 11:51 AM
alThor alThor is offline
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Join Date: Mar 2004
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Default Re: If I wanted to shuffle 8 decks of cards

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And I decided to this shuffle by picking two random cards from the 8 decks ans swapping their position, how many iterations would I need to have a properly shuffled 8 decks of cards?

Is this a good method of shuffling for statistial analysis?

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Do it this way. Randomly swap the card in slot 1 with the card in a randomly chosen slot (possibly itself!). Then swap slot 2's card with a card randomly chosen from slot 2...n. Swap 3's into 3...n, etc. This takes n-1 iterations, and is guaranteed random (up to the limits of your rng).

alThor
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