Great Collection of Minimal and Clean Implementations of Machine Learning Algorithms

Want to implement machine learning algorithms from scratch? A recent KDnuggets poll asked "Which methods/algorithms you used in the past 12 months for an actual Data Science-related application?" with results found here. The results are analyzed by industry employment sector and region, but the main take away for the uninitiated is that there are a wide array of algorithms covered. And let's be clear: this is not a complete representation of available machine learning algorithms, but rather a subset of the most-used algorithms (as per our readers). There are lots of machine learning algorithms in existence today.