今天读到一篇不错的文章，讨论了 IBM FreaAI 的一些分析过程，前面还有两篇概要也可以一起读。文章着重对树模型划分出来的各个小区间做评估，找到隐患最大的地方。大体的流程上是对原始特征做直方图，随后到 PDF，再不断便利 Y 轴找到既定的 metric 剧烈变化的地方。可以配合树模型自己算出来的信息熵一起用。这个技巧不是太常见，我只在两年前某一次 Kaggle 竞赛中遇到，举办方弄了一些诡异的合成数据…… https://towardsdatascience.com/how-to-find-weaknesses-in-your-machine-learning-models-3bcce3c7d71e
BY Data Science Archive
Importantly, that investor viewpoint is not new. It cycles in when conditions are right (and vice versa). It also brings the ineffective warnings of an overpriced market with it.Looking toward a good 2022 stock market, there is no apparent reason to expect these issues to change.
Traders also expressed uncertainty about the situation with China Evergrande, as the indebted property company has not provided clarification about a key interest payment.In economic news, the Commerce Department reported an unexpected increase in U.S. new home sales in August.Crude oil prices climbed Friday and front-month WTI oil futures contracts saw gains for a fifth straight week amid tighter supplies. West Texas Intermediate Crude oil futures for November rose $0.68 or 0.9 percent at 73.98 a barrel. WTI Crude futures gained 2.8 percent for the week.
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