Systems engineering machine learning learning feature (c) - FM sparse feature of the algorithm

Transfer: https://www.cnblogs.com/pinard/p/6370127.html

Pinard NOTE: The above should be the last sentence "and gθ (x) gθ (x) the use of y (x) -θhθ (x) y ^ (x) -θhθ (x) is calculated."

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Origin blog.csdn.net/App_12062011/article/details/90610531