mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Dunning <>
Subject Re: Probabilities in Bayesian classifier
Date Wed, 15 Jun 2011 18:44:07 GMT
This is what the term Naive is used in the name.  The scores for this kind
of algorithm are 0 to 1 or are logarithms of such a number, but are not at
all calibrated probabilities.

And, frankly, it is rare in practice for the output of logistic regression
to be calibrated either.  Those outputs are much more like probabilities,
but they still have some issues.

On Wed, Jun 15, 2011 at 6:56 PM, Svetlomir Kasabov <> wrote:

> unfortunately, Mahout's Naive Bayes implemention can't calculate
> probabilities. You are now probably really astonished - I could'nt believe
> it too, as I read that (I think this is some kind of 'strange', since
> Bayes's main concept is probability calculation). It's a pitty, that such a
> great framework like Mahout has restricted the Bayesian concept that way. In
> addition, Naive Bayes is (as far as I know) only text-oriented, you can
> apply it only on documents . Mahout is still wonderful, though, because it
> lets us calculate probabilities using Logistic Regression.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message