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Opened 12 years ago

#19 new enhancement

Getting rid of floats !

Reported by: anonymous Owned by: fradav
Priority: minor Milestone:
Component: Multiboost code Version:
Keywords: Cc:

Description

Accelerating Multiboost by using integers instead of floating point numbers to represent example weights.
Rough details :

  • compute the sum of the integer weights (maxint) and the precision (1/maxint).
  • check the formula:

alpha = 0.5 * log( maxint + gamma / (maxint - gamma))

  • after the reweighting of the examples :

w = ceil(w) if misclassified
w = floor(w) otherwise

  • check the sum w.r.t the tolerance : epsilon = numExamples * precision

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