Just say something
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Identify the suspect through machine learning.
Just say something
数据集分析:
这个数据集很不平衡(imbalance), 也就说明accuracy并不是很好的评估指标,选择precision和recall更好一些。
在交叉验证的时候,因为数据的不平衡性,我们会选用Stratified Shuffle Split的方式将数据分为验证集和测试集。
数据样本比较少,因此我们可以使用GridSearchCV来进行参数调整,如果较大的数据则会花费较长的时间,可以考虑使用RandomizedSearchCV.
tester.py中使用的验证方式为StratifiedShuffleSplit。你可以思考一下这种验证方法的工作原理,并结合其特点思考一下为什么SratifiedShuffleSplit更加适合该试验。(提示:查看一下该算法在将数据分为培训和测试集时有什么特点。)
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