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/*
* @license Apache-2.0
*
* Copyright (c) 2020 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// TypeScript Version: 2.0
/**
* Data point.
*/
interface Observation {
/**
* Observation number.
*/
obs: number;
/**
* Town name.
*/
town: string;
/**
* Town identifier.
*/
town_id: number;
/**
* Tract identifier.
*/
tract: number;
/**
* Longitude.
*/
lon: number;
/**
* Latitude.
*/
lat: number;
/**
* Median value of owner-occupied homes in $1000's.
*/
medv: number;
/**
* Corrected median value of owner-occupied homes in $1000's.
*/
cmedv: number;
/**
* Per capita crime rate by town.
*/
crim: number;
/**
* Proportion of residential land zoned for lots over 25,000 square feet.
*/
zn: number;
/**
* Proportion of non-retail business acres per town.
*/
indus: number;
/**
* Charles River dummy variable (1 if tract bounds river; 0 otherwise).
*/
chas: number;
/**
* Nitric oxides concentration (parts per 10 million).
*/
nox: number;
/**
* Average number of rooms per dwelling.
*/
rm: number;
/**
* Proportion of owner-occupied units built prior to 1940.
*/
age: number;
/**
* Weighted distances to five Boston employment centers.
*/
dis: number;
/**
* Index of accessibility to radial highways.
*/
rad: number;
/**
* Full-value property-tax rate per $10,000.
*/
tax: number;
/**
* Pupil-teacher ratio by town.
*/
ptratio: number;
/**
* 1000(Bk-0.63)^2 where Bk is the proportion of blacks by town.
*/
b: number;
/**
* Percent lower status of the population.
*/
lstat: number;
}
/**
* Returns a (corrected) dataset derived from information collected by the US Census Service concerning housing in Boston, Massachusetts (1978).
*
* ## Notes
*
* - This function synchronously reads data from disk for each invocation. Such behavior is intentional and so is the avoidance of `require`. We assume that invocations are infrequent, and we want to avoid the `require` cache. This means that we allow data to be garbage collected and a user is responsible for explicitly caching data.
*
*
* @throws unable to read data
* @returns housing data
*
* @example
* var data = dataset();
* // returns [ {...}, {...}, ... ]
*/
declare function dataset(): Array<Observation>;
// EXPORTS //
export = dataset;
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