I try to use J48 classifier from RWeka library in R (C4.5 algorithm). I can parametrize this classifier with C parameter which means 'confidence factor'. What does this value exactly mean? I know that bigger value means that I believe more my learning set is a good representation of the whole population and the algorithm will be less likely to prune. But what it exactly means? Is there any formula how to interpret this value?
Meaning of confidence factor in J48
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