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Re: DM: Re: problem of sample sizeFrom: Roberto Bayardo/Almaden/IBM Date: Wed, 30 Aug 2000 12:05:05 -0700 One useful way of analyzing minority classes is to use a rule miner which accepts a consequent constraint (In this case, the consequent constraint would be the minority class identifier). This won't build a classifier for you, but it will build a useful descriptive model (which can then be turned into a predictive model with other techniques). I have put the "dense-miner" algorithm on-line, which allows you to do just this. If you can make your data-set HTTP accessible, you can try it out. Here are a few things to note: o This publically accessible version has several restrictions. For example, it will only attempt data-sets of size 10 MBytes or less. o Works only with categorical attributes (so continuous attributes must be discretized). Instructions are available at: http://www.almaden.ibm.com/cs/people/bayardo/vinci/index.html Roberto Bayardo
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