October 2021
Intermediate to advanced
289 pages
8h 31m
Chinese
Content preview from 数据科学中的实用统计学(第2版)
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回归与预测
｜
123
4.2.1
示例
：
金县房屋数据
使用多元线性回归的一个例子是估计房屋价值。为了估算房产税，金县的估价员必须估计
出房屋的价值。房地产从业人员与房屋购买者根据像
Zillow
这样
的大众网站来确定一个合
理的价格。下面是美国华盛顿州金县的一些房屋数据，来自于
house
这个
data.frame
：
head(house[, c('AdjSalePrice', 'SqFtTotLiving', 'SqFtLot', 'Bathrooms',
'Bedrooms', 'BldgGrade')])
Source: local data frame [6 x 6]
AdjSalePrice SqFtTotLiving SqFtLot Bathrooms Bedrooms BldgGrade
(dbl) (int) (int) (dbl) (int) (int)
1 300805 2400 9373 3.00 6 7
2 1076162 3764 20156 3.75 4 10
3 761805 2060 26036 1.75 4 8
4 442065 3200 8618 3.75 5 7
5 297065 1720 8620 1.75 4 7
6 411781 930 1012 1.50 2 8
pandas
数据框的
head
方法可以列出最前面的几行数据：
subset = ['AdjSalePrice', 'SqFtTotLiving', 'SqFtLot', 'Bathrooms',
'Bedrooms', ...
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