Python-分类问题示例-OneR-学习笔记

《Python数据挖掘入门与实践》Robert Layton 人民邮电出版社

The OneR algorithm is:

• For each variable
  • For each value of the variable
    • The prediction based on this variable goes the most frequent class
    • Compute the error of this prediction
  • Sum the prediction errors for all values of the variable
• Use the variable with the lowest error

import numpy as np #numpy提供矩阵运算功能

# Load our dataset  
f