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Boston房产价格数据集，总共有14个字段，分别为CRIM、ZN、INDUS、CHAS、NOX、RM、AGE、DIS、RAD、TAX、PTRATIO、B、LSTAT和MEDV。其中，前13个字段是对某一个房产的描述信息，最后一个是平均房产价格。 字段解释： 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 nitric 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 distances to five Boston employment centres RAD index of accessibility to radial highways TAX full-value property-tax rate per $10,000 PTRATIO pupil-teacher ratio by town B 1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town LSTAT % lower status of the population MEDV Median value of owner-occupied homes in $1000's