node-red-contrib-tak-registration/node_modules/skmeans/dist/node/distance.js

A Node-RED node to register to TAK and to help wrap files as datapackages to send to TAK

"use strict";

module.exports = {
	/**
  * Euclidean distance
  */
	eudist: function eudist(v1, v2, sqrt) {
		var len = v1.length;
		var sum = 0;

		for (var i = 0; i < len; i++) {
			var d = (v1[i] || 0) - (v2[i] || 0);
			sum += d * d;
		}
		// Square root not really needed
		return sqrt ? Math.sqrt(sum) : sum;
	},
	mandist: function mandist(v1, v2, sqrt) {
		var len = v1.length;
		var sum = 0;

		for (var i = 0; i < len; i++) {
			sum += Math.abs((v1[i] || 0) - (v2[i] || 0));
		}

		// Square root not really needed
		return sqrt ? Math.sqrt(sum) : sum;
	},


	/**
  * Unidimensional distance
  */
	dist: function dist(v1, v2, sqrt) {
		var d = Math.abs(v1 - v2);
		return sqrt ? d : d * d;
	}
};
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