一：项目简介
波斯顿房价回归预测是Kaggle比赛的一个项目之一，项目地址：波士顿住房|Kaggle
该数据集共有506行和14列，数据包含以下列：
crim
per capita crime rate by town.
zn
proportion of residential land zoned for lots over 25,000 sq.ft.
indus
proportion of non-retail business acres per town.
chas
Charles River dummy variable (= 1 if tract bounds river; 0 otherwise).
nox
nitrogen oxides concentration (parts per 10 million).
rm
average number of rooms per dwelling.
age
proportion of owner-occupied units built prior to 1940.
dis
weighted mean of distances to five Boston employment centres.
rad
index of accessibility to radi
