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107 lines
3.6 KiB
107 lines
3.6 KiB
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/* |
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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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var numberUtil = require("../../lib/util/number"); |
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/* |
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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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/** |
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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 {Array.<number>} 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 datat set for the second box) |
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* ... |
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* ] |
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* @param {Object} [opt] |
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* |
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* @param {(number|string)} [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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* @param {(number|string)} [opt.layout='horizontal'] |
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* Box plot layout, can be 'horizontal' or 'vertical' |
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* @return {Object} { |
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* boxData: Array.<Array.<number>> |
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* outliers: Array.<Array.<number>> |
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* axisData: Array.<string> |
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* } |
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*/ |
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function _default(rawData, opt) { |
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opt = opt || []; |
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var boxData = []; |
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var outliers = []; |
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var axisData = []; |
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var boundIQR = opt.boundIQR; |
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var useExtreme = boundIQR === 'none' || boundIQR === 0; |
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for (var i = 0; i < rawData.length; i++) { |
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axisData.push(i + ''); |
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var ascList = numberUtil.asc(rawData[i].slice()); |
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var Q1 = numberUtil.quantile(ascList, 0.25); |
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var Q2 = numberUtil.quantile(ascList, 0.5); |
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var Q3 = numberUtil.quantile(ascList, 0.75); |
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var min = ascList[0]; |
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var max = ascList[ascList.length - 1]; |
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var bound = (boundIQR == null ? 1.5 : boundIQR) * (Q3 - Q1); |
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var low = useExtreme ? min : Math.max(min, Q1 - bound); |
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var high = useExtreme ? max : Math.min(max, Q3 + bound); |
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boxData.push([low, Q1, Q2, Q3, high]); |
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for (var j = 0; j < ascList.length; j++) { |
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var dataItem = ascList[j]; |
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if (dataItem < low || dataItem > high) { |
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var outlier = [i, dataItem]; |
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opt.layout === 'vertical' && outlier.reverse(); |
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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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axisData: axisData |
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}; |
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} |
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module.exports = _default; |