Javascript生成14个数字（具有正态分布，负偏斜和正偏斜）

Question

  

我希望生成14个数字（具有正态分布，负偏斜和正偏斜），Sum等于100.（在Javascript中）

     

注1：返回的数字应介于0到100之间

     

注2：这只是正态分布......不是负偏斜和正偏斜

function distNormal() {
	
	var fldCnt = 14;
	var _val = 100
	//fldCntNotGray = $(_elm).not('.grayField').length;
	//fldCntGray = fldCnt-fldCntNotGray;
	//if (fldCntNotGray != 0) fldCnt = fldCntNotGray;
	if (Math.abs(fldCnt)%2 === 0) {isOdd = false;} else {isOdd = true;}
	if (isOdd) {
		meadian = parseInt(fldCnt/2)+1;
	} else {
		meadian = parseInt(fldCnt/2);
	}
	var sum = 0;
	var sumGray = 0;
	var cntGray = 0;
	var PI = Math.PI;
	
	var normalPattern = '', plus, MaxMinMax, MinMaxMin, normalDistr, A, Amax, Amin, Smax, Smin, Mu, Sigma, xi, arrPattern;
	normRatio = parseFloat((_val/meadian)/(fldCnt-meadian)*1.0874);
	for (var i = 0; i < fldCnt; i++){
		if (i < meadian) {plus = 0;} else {plus = 1;}
		if (normalPattern !== '') {normalPattern += '|';}
		MaxMinMax = Math.abs(parseInt((fldCnt/2-i)*-1)+plus);
		MinMaxMin = Math.abs((MaxMinMax+Math.abs(MaxMinMax)-MaxMinMax)-meadian);
		normalDistr = toPrecision(MinMaxMin*normRatio,1);
		
		A = fldCnt;
		Amax = _val;
		Amin = 1;
		Smax = 15;
		Smin = 1;
		Mu = A/2;
		Sigma = Smax+((Smax-Smin)/(Amax-Amin))*(A-Amax);
		xi = 1/(Sigma*(2*PI)^0.5) * Math.exp(-((i-Mu)^2) / (2*Sigma^2));
		
		//normalDistr = Math.round(xi-A);
		//$("input#"+_fld+"-"+(i+1)).not('.grayField').val(normalDistr);
		normalPattern += normalDistr;
		sum += parseFloat(normalDistr);
	}
	arrPattern = (normalPattern);
	alert(arrPattern);
}


function toPrecision(number,precision){
	var str = number.toString();
	var pos = str.indexOf(".");
	if(pos!=-1){
		var tempArr = str.split(".");
		if(tempArr[1].length<precision){
			tempArr[1] = parseInt(tempArr[1])*Math.pow(10,precision-parseInt(tempArr[1]))+"";
		} else{
			tempArr[1] = tempArr[1].slice(0,precision);
		}
		str = tempArr.join(".");
	} else {
		var tempSuffix = "";
		while(precision){
			tempSuffix += "0";
			precision--;      
		}
		str += "."+tempSuffix;
	}       
	return parseFloat(str);
}

  

注意：我返回的数字总和不是100 ....而且分发不准确！