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看陈峰的书啊,上面都讲了。
论坛上就有。
_cut1, _cut2, and _cut3 are called cut points. Please see P.176-178 in that book. The formula on the P. 178 has a typo (or error). Check the correct one on the P.176.
yangzi468 发表于 2010-4-5 23:40 就是y大于cut1等于1,就是三个分割点