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ukwn
2012 Apr 27
1
Handling Negative value due to logarithm of probabilities.
...approach selecting value of K by statistically, i will mean to
run the unigram Weighting scheme on large collection and observing lowest
probability which could be found and hence approximating the value of K or
any other method.
I asked same Question on Stack overflow about this.
http://goo.gl/ykwN4
They suggested:
*"Could you simple take the negative of the logarithm? Since you are
dealing with probabilities (i.e. values <= 1), the logarithm is always
negative,
so negating it will always make it positive."*
But this approach wont be a good idea as large values will indicates...