Re: [R] hash code for arbitrary object

From: Marc Schwartz <>
Date: Wed 03 Aug 2005 - 14:26:34 EST

On Wed, 2005-08-03 at 12:05 +0800, Adrian Baddeley wrote:
> Can anyone suggest a simple way to calculate a 'hash code'
> from an arbitrary R object?
> hash(x) should return an integer or string
> with the property that
> if hash(x) != hash(y) then x and y are not identical
> and the time to compute hash(x) should be quite short.
> Any suggestions welcome
> thanks
> Adrian Baddeley

Take a look at Dirk Eddelbuettel's digest() function in the package of the same name on CRAN. Be sure to read the details section for caveats regarding collisions.

HTH, Marc Schwartz mailing list PLEASE do read the posting guide! Received on Wed Aug 03 14:32:42 2005

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