Google Prediction API
这个好玩啊。google开放了可以让用户使用google的有监督学习算法（不单是算法，而且是直接在google的服务器上帮你跑）的API。
The Prediction API enables access to Google’s machine learning algorithms to analyze your historic data and predict likely future outcomes. Upload your data to Google Storage for Developers, then use the Prediction API to make real-time decisions in your applications. The Prediction API implements supervised learning algorithms as a RESTful web service(这是什么？不懂啊。。) to let you leverage patterns in your data, providing more relevant information to your users. Run your predictions on Google’s infrastructure and scale effortlessly as your data grows in size and complexity.
看起来是个黑盒子。开发者只用把数据提交到Google Storage for Developers，然后通过Google App Engine, Apps Script (Google Spreadsheets), web & desktop apps, and command line来调用这个prediction api，google会自动选择合适的算法来解决你的问题。
google建议可以用做一下几个用途，主要是从网站开发者的角度出发的。
- Language identification
- Customer sentiment analysis
- Product recommendations & upsell opportunities
- Message routing decisions
- Diagnostics
- Document and email classification
- Suspicious activity identification
- Churn analysis（这是什么？？）
貌似很不错啊，正适合做混搭（mashup).。
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