/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import { quantile, asc } from '../../util/number';
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import { isFunction, isString } from 'zrender/src/core/util';
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export interface PrepareBoxplotDataOpt {
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boundIQR?: number | 'none';
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// Like "expriment{value}" produce: "expriment0", "expriment1", ...
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itemNameFormatter?: string | ((params: { value: number }) => string);
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}
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/**
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* See:
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* <https://en.wikipedia.org/wiki/Box_plot#cite_note-frigge_hoaglin_iglewicz-2>
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* <http://stat.ethz.ch/R-manual/R-devel/library/grDevices/html/boxplot.stats.html>
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*
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* Helper method for preparing data.
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*
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* @param rawData like
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* [
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* [12,232,443], (raw data set for the first box)
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* [3843,5545,1232], (raw data set for the second box)
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* ...
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* ]
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* @param opt.boundIQR=1.5 Data less than min bound is outlier.
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* default 1.5, means Q1 - 1.5 * (Q3 - Q1).
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* If 'none'/0 passed, min bound will not be used.
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*/
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export default function prepareBoxplotData(
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rawData: number[][],
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opt: PrepareBoxplotDataOpt
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): {
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boxData: (number | string)[][];
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outliers: (number | string)[][];
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} {
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opt = opt || {};
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const boxData = [];
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const outliers = [];
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const boundIQR = opt.boundIQR;
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const useExtreme = boundIQR === 'none' || boundIQR === 0;
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for (let i = 0; i < rawData.length; i++) {
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const ascList = asc(rawData[i].slice());
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const Q1 = quantile(ascList, 0.25);
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const Q2 = quantile(ascList, 0.5);
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const Q3 = quantile(ascList, 0.75);
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const min = ascList[0];
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const max = ascList[ascList.length - 1];
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const bound = (boundIQR == null ? 1.5 : boundIQR as number) * (Q3 - Q1);
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const low = useExtreme
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? min
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: Math.max(min, Q1 - bound);
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const high = useExtreme
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? max
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: Math.min(max, Q3 + bound);
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const itemNameFormatter = opt.itemNameFormatter;
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const itemName = isFunction(itemNameFormatter)
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? itemNameFormatter({ value: i })
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: isString(itemNameFormatter)
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? itemNameFormatter.replace('{value}', i + '')
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: i + '';
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boxData.push([itemName, low, Q1, Q2, Q3, high]);
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for (let j = 0; j < ascList.length; j++) {
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const dataItem = ascList[j];
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if (dataItem < low || dataItem > high) {
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const outlier = [itemName, dataItem];
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outliers.push(outlier);
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}
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}
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}
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return {
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boxData: boxData,
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outliers: outliers
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};
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}
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