Last change
on this file since 19921 was 18225, checked in by dneise, 10 years ago |
adding new library Func.js, was formerly implemented inside CheckUnderflow.js
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File size:
1.2 KB
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1 | 'use strict';
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2 |
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3 | if (!("Func" in this))
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4 | {
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5 | var Func = {
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6 |
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7 | sum : function(a, b) {
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8 | return a + b;
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9 | },
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10 | sq : function(a, b) {
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11 | return Math.sqrt(a*a + b*b);
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12 | },
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13 | min : function(a, b) {
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14 | return Math.min(a, b);
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15 | },
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16 | max : function(a, b) {
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17 | return Math.max(a, b);
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18 | },
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19 | avg : function(arr) {
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20 | return arr.reduce(this.Sum, 0)/arr.length;
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21 | }
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22 | stat : function(arr, func)
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23 | {
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24 | if (arr.length==0)
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25 | return undefined;
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26 |
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27 | var sum = 0;
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28 | var sq = 0;
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29 | var cnt = 0;
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30 | var min = arr[0];
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31 | var max = arr[0];
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32 | arr.forEach(
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33 | function(val, idx) {
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34 | sum+=val;
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35 | sq+=val*val;
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36 | if (val>max)
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37 | max=val;
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38 | if (val<min)
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39 | min=val;
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40 | if (func && func(val, idx))
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41 | cnt++
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42 | }
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43 | );
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44 | sum /= arr.length;
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45 | sq /= arr.length;
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46 |
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47 | return { avg:sum, rms:Math.sqrt(sq-sum*sum), min:min, max:max, count:cnt };
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48 | },
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49 | };
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50 | }
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51 | else{
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52 | console.out("multiple include of 'Func.js'")
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53 | }
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