Comments (1)
@yuqing-liu-dut 特征工程是参考了criteo夺冠的队伍的特征工程方案,但是没有加入他们的gbdt的叶子节点的特征,只用了原始的39个特征。而在我的代码中,针对该数据集,Xi_train存储的就是值为1的index,而value是一直都为1的,这个时候是value不是标签,是一个横为1的值。主要是考虑到了拓展性,考虑到tfidf之类方法生成数来的离散化特征是有权重的,所以弄了value这个变量作为权重。
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