Ant-Miner is an Ant Colony Optimization algorithm for classification task. This paper proposes an improved version of Ant-Miner, named mAnt-Miner+, which is based on mAnt-Miner (Ant-Miner that uses a population of many ants). mAnt-Miner+ uses a simple and invariable heuristic strategy, that avoids it easily trapping in the local optimal solution and improves the efficiency of the algorithm. mAnt-Miner+ has been compared against Ant-Miner and mAnt-Miner in six public domain data sets. The results show that: 1) in term of predictive accuracy, mAnt-Miner+ is competitive with Ant-Miner and better than mAnt-Miner; 2) mAnt-Miner+ is faster than Ant-Miner and mAnt-Miner; 3) the difference of the rule simplicity between three algorithms is small.
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