distanceWeight

描述

¥Description

参数

¥Parameters

名称	类型	描述
fc	FeatureCollection<任意>	要素集合。
options?	对象	选项对象。
options.threshold?	number	If the distance between neighbor and target features is greater than threshold, the weight of that neighbor is 0.(默认 10000)
options.p?	number	明可夫斯基 p 范数距离参数。1：曼哈顿距离。2：欧氏距离。1=<p<=无穷大。(默认 2)
options.binary?	boolean	If true, weight=1 if d <= threshold otherwise weight=0.如果为 false，则 weight=Math.pow(d, alpha)。(默认 false)
options.alpha?	number	距离衰减参数。A big value means the weight decay quickly as distance increases.(默认 -1)
options.standardization?	boolean	行标准化。(默认 false)

返回

¥Returns

数组<数组<number>> 距离权重矩阵。

¥Array<Array<number>> distance weight matrix.

示例

¥Examples

var bbox = [-65, 40, -63, 42];
var dataset = turf.randomPoint(100, { bbox: bbox });
var result = turf.distanceWeight(dataset);

安装

¥Installation

$ npm install @turf/distance-weight

import { distanceWeight } from "@turf/distance-weight";
const result = distanceWeight(...);

$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.distanceWeight(...);