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?
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This is a question better asked on CrossValidated.com or the Data Science forum. – IRTFM Apr 14 '19 at 16:27
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…or by means of a [simple web search](https://duckduckgo.com/?q=weka+j48+confidence+factor&t=ffsb&ia=web)? – nekomatic Apr 16 '19 at 15:42