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define(function (require) {
var quantile = require('./quantile');
var numberUtil = require('echarts').number;
/**
* Helper method for preparing data.
* @param {Array.<number>} rawData like
* [
* [12,232,443], (raw data set for the first box)
* [3843,5545,1232], (raw datat set for the second box)
* ...
* ]
* @param {Object} [opt]
*
* @param {(number|string)} [opt.boundIQR=1.5] Data less than min bound is outlier.
* default 1.5, means Q1 - 1.5 * (Q3 - Q1).
* If pass 'none', min bound will not be used.
* @param {(number|string)} [opt.layout='horizontal']
* Box plot layout, can be 'horizontal' or 'vertical'
*/
return function (rawData, opt) {
opt = opt || [];
var boxData = [];
var outliers = [];
var axisData = [];
var boundIQR = opt.boundIQR;
for (var i = 0; i < rawData.length; i++) {
axisData.push(i + '');
var ascList = numberUtil.asc(rawData[i].slice());
var Q1 = quantile(ascList, 0.25);
var Q2 = quantile(ascList, 0.5);
var Q3 = quantile(ascList, 0.75);
var IQR = Q3 - Q1;
var low = boundIQR === 'none'
? ascList[0]
: Q1 - (boundIQR == null ? 1.5 : boundIQR) * IQR;
var high = boundIQR === 'none'
? ascList[ascList.length - 1]
: Q3 + (boundIQR == null ? 1.5 : boundIQR) * IQR;
boxData.push([low, Q1, Q2, Q3, high]);
for (var j = 0; j < ascList.length; j++) {
var dataItem = ascList[j];
if (dataItem < low || dataItem > high) {
var outlier = [i, dataItem];
opt.layout === 'vertical' && outlier.reverse();
outliers.push(outlier);
}
}
}
return {
boxData: boxData,
outliers: outliers,
axisData: axisData
};
};
});