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
The Singapore stock market has alternated between positive and negative finishes through the last five trading days since the end of the two-day winning streak in which it had added more than a dozen points or 0.4 percent. The Straits Times Index now sits just above the 3,060-point plateau and it's likely to see a narrow trading range on Monday.
I have no inside knowledge of a potential stock listing of the popular anti-Whatsapp messaging app, Telegram. But I know this much, judging by most people I talk to, especially crypto investors, if Telegram ever went public, people would gobble it up. I know I would. I’m waiting for it. So is Sergei Sergienko, who claims he owns $800,000 of Telegram’s pre-initial coin offering (ICO) tokens. “If Telegram does a SPAC IPO, there would be demand for this issue. It would probably outstrip the interest we saw during the ICO. Why? Because as of right now Telegram looks like a liberal application that can accept anyone - right after WhatsApp and others have turn on the censorship,” he says.
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