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Coursera上数据分析实例 --R语言如何对垃圾邮件进行分类 Structure of a Data Analysis l Define the question l Define the ideal data set l Determine what data you can access l 阅读全文
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作用：Clustering organizes things that are close into groups 算法步骤： a).Find closest two thing b).Put them together c).Find next closest 算法结果：A tree showin 阅读全文
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# !/usr/bin/env python# -*- coding: utf-8 -*-# 據說係菜鳥，程序員，大師，神人 四個等級寫出代碼的區別...import math as m#for i in range(100000): x = int(m.sqrt(i + 100)) y = int 阅读全文