145 lines
4.7 KiB
JavaScript
145 lines
4.7 KiB
JavaScript
/* *
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*
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* (c) 2010-2020 Highsoft AS
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*
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* Author: Sebastian Domas
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*
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* License: www.highcharts.com/license
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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'use strict';
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import U from '../parts/Utilities.js';
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var correctFloat = U.correctFloat, isNumber = U.isNumber, merge = U.merge, seriesType = U.seriesType;
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import derivedSeriesMixin from '../mixins/derived-series.js';
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/* ************************************************************************** *
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* BELL CURVE *
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* ************************************************************************** */
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/* eslint-disable valid-jsdoc */
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/**
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* @private
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*/
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function mean(data) {
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var length = data.length, sum = data.reduce(function (sum, value) {
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return (sum += value);
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}, 0);
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return length > 0 && sum / length;
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}
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/**
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* @private
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*/
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function standardDeviation(data, average) {
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var len = data.length, sum;
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average = isNumber(average) ? average : mean(data);
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sum = data.reduce(function (sum, value) {
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var diff = value - average;
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return (sum += diff * diff);
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}, 0);
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return len > 1 && Math.sqrt(sum / (len - 1));
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}
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/**
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* @private
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*/
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function normalDensity(x, mean, standardDeviation) {
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var translation = x - mean;
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return Math.exp(-(translation * translation) /
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(2 * standardDeviation * standardDeviation)) / (standardDeviation * Math.sqrt(2 * Math.PI));
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}
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/* eslint-enable valid-jsdoc */
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/**
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* Bell curve class
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*
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* @private
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* @class
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* @name Highcharts.seriesTypes.bellcurve
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*
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* @augments Highcharts.Series
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*/
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seriesType('bellcurve', 'areaspline'
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/**
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* A bell curve is an areaspline series which represents the probability
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* density function of the normal distribution. It calculates mean and
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* standard deviation of the base series data and plots the curve according
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* to the calculated parameters.
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*
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* @sample {highcharts} highcharts/demo/bellcurve/
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* Bell curve
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*
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* @extends plotOptions.areaspline
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* @since 6.0.0
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* @product highcharts
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* @excluding boostThreshold, connectNulls, dragDrop, stacking,
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* pointInterval, pointIntervalUnit
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* @requires modules/bellcurve
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* @optionparent plotOptions.bellcurve
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*/
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, {
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/**
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* This option allows to define the length of the bell curve. A unit of
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* the length of the bell curve is standard deviation.
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*
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* @sample highcharts/plotoptions/bellcurve-intervals-pointsininterval
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* Intervals and points in interval
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*/
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intervals: 3,
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/**
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* Defines how many points should be plotted within 1 interval. See
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* `plotOptions.bellcurve.intervals`.
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*
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* @sample highcharts/plotoptions/bellcurve-intervals-pointsininterval
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* Intervals and points in interval
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*/
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pointsInInterval: 3,
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marker: {
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enabled: false
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}
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}, merge(derivedSeriesMixin, {
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setMean: function () {
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this.mean = correctFloat(mean(this.baseSeries.yData));
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},
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setStandardDeviation: function () {
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this.standardDeviation = correctFloat(standardDeviation(this.baseSeries.yData, this.mean));
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},
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setDerivedData: function () {
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if (this.baseSeries.yData.length > 1) {
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this.setMean();
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this.setStandardDeviation();
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this.setData(this.derivedData(this.mean, this.standardDeviation), false);
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}
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return (void 0);
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},
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derivedData: function (mean, standardDeviation) {
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var intervals = this.options.intervals, pointsInInterval = this.options.pointsInInterval, x = mean - intervals * standardDeviation, stop = intervals * pointsInInterval * 2 + 1, increment = standardDeviation / pointsInInterval, data = [], i;
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for (i = 0; i < stop; i++) {
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data.push([x, normalDensity(x, mean, standardDeviation)]);
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x += increment;
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}
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return data;
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}
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}));
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/**
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* A `bellcurve` series. If the [type](#series.bellcurve.type) option is not
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* specified, it is inherited from [chart.type](#chart.type).
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*
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* For options that apply to multiple series, it is recommended to add
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* them to the [plotOptions.series](#plotOptions.series) options structure.
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* To apply to all series of this specific type, apply it to
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* [plotOptions.bellcurve](#plotOptions.bellcurve).
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*
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* @extends series,plotOptions.bellcurve
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* @since 6.0.0
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* @product highcharts
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* @excluding dataParser, dataURL, data
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* @requires modules/bellcurve
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* @apioption series.bellcurve
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*/
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/**
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* An integer identifying the index to use for the base series, or a string
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* representing the id of the series.
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*
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* @type {number|string}
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* @apioption series.bellcurve.baseSeries
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*/
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''; // adds doclets above to transpiled file
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