A new method is proposed for sample selection in large data set. 提出了一種大規模數據集的訓練樣本選擇方法。
To classify the collectivity, uaually a training sample is needed.The classification and statistical indexes of the training sample are known. 為了對總體分類，一般應該有訓練樣本，它的分類和統計指標都是已知的。
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