Code of my MOOC Course <Play with Machine Learning Algorithms>. Updated contents and practices are also included. 我在慕课网上的课程《Python3 入门机器学习》示例代码。课程的更多更新内容及辅助练习也将逐步添加进这个代码仓。
bobo老师，我很喜欢您的课程，可以这么说说，您的声音和代码陪我度过了很多重要时刻。
我想问一下，您会出更多的课程吗？会是什么方向的呢？
我期待的方向包括机器学习，数学，算法等，希望您可以出一些更高阶的课程，可以带我领略更前沿更有难度的知识！
无论如何，您是一个重要的人，我想成为和您一样的人!
哈哈哈哈哈哈！没有问题，就想给个赞！
https://github.com/liuyubobobo/Play-with-Machine-Learning-Algorithms/blob/master/07-PCA-and-Gradient-Ascent/Optional-01-PCA-in-3d-Data/Optional-01-PCA-in-3d-Data.ipynb
这部分代码中IN(4)及其以下除了定义函数外的 X 都要改成 X_demean 应该是疏忽了吧。
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