Move the math helper.

Author: 100pah

extension-src/dataTool/prepareBoxplotData.js

@@ -17,7 +17,6 @@
 * under the License.
 */
 
-import quantile from './quantile';
 import * as numberUtil from '../../src/util/number';
 
 /**
@@ -58,9 +57,9 @@ export default function (rawData, opt) {
         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 Q1 = numberUtil.quantile(ascList, 0.25);
+        var Q2 = numberUtil.quantile(ascList, 0.5);
+        var Q3 = numberUtil.quantile(ascList, 0.75);
         var min = ascList[0];
         var max = ascList[ascList.length - 1];
 

extension-src/dataTool/quantile.js

@@ -409,6 +409,50 @@ export function nice(val, round) {
     return exponent >= -20 ? +val.toFixed(exponent < 0 ? -exponent : 0) : val;
 }
 
+/**
+ * BSD 3-Clause
+ *
+ * Copyright (c) 2010-2015, Michael Bostock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * The name Michael Bostock may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @see <https://github.com/mbostock/d3/blob/master/src/arrays/quantile.js>
+ * @see <http://en.wikipedia.org/wiki/Quantile>
+ * @param {Array.<number>} ascArr
+ */
+export function quantile(ascArr, p) {
+    var H = (ascArr.length - 1) * p + 1;
+    var h = Math.floor(H);
+    var v = +ascArr[h - 1];
+    var e = H - h;
+    return e ? v + e * (ascArr[h] - v) : v;
+}
+
 /**
  * Order intervals asc, and split them when overlap.
  * expect(numberUtil.reformIntervals([