可塑性指数RDPI的计算公式如下：
需要补充一点，i不能等于i‘。
假设a为集合A的元素，b为集合B的元素，则对于a和b在可塑性指数中的贡献为tmp=(Math.abs(parseFloat(a[i])-parseFloat(b[j])))/(parseFloat(a[i])+parseFloat(b[j]))，随后求和取平均值，为了通用性和界面友好，采用HTML+Javascript构建本脚本。版本一（calRDPI v1）如下
<html>
<body>
<h1>计算RDPI</h1>
<form id="ctrl">
<label>数组1，英文空格分割<input type="text" id="a_str" size="100"/></label><br />
<label>数组2，英文空格分割<input type="text" id="b_str" size="100"/></label><br />
<input type="button" id="submit" value="提交" />
<input type="reset" id="reset" value="重置" /><br />
<label>提示消息<input type="text" id="msg" readonly="ture" size="100" /></label>
</form>
<script>
var oSubmit = document.getElementById("submit");
var oMsg = document.getElementById("msg");
oSubmit.onclick = init;
function init(){
var oA = document.getElementById("a_str");
var oB = document.getElementById("b_str");
var a = oA.value.split(" ");
var b = oB.value.split(" ");
// var a = [1,2,3,4,5,6,8];
// var b = [2,3,4,5,6,7,9];
var sum_array = new Array();
var sum_num = 0;
for (var i = 0; i < a.length; i++){
for (var j = 0; j < b.length; j++){
if(a[i] != "" && b[j] != ""){
var tmp = (Math.abs(parseFloat(a[i])-parseFloat(b[j])))/(parseFloat(a[i])+parseFloat(b[j]));
sum_array.push (tmp);
sum_num += tmp;
console.log(tmp);
}
}
}
oMsg.value = "计算"+sum_array.length+"次，加和为"+sum_num;
}
</script>
</body>
</html>
当处理因素为4时，则有四组数组，手动遍历组合比较麻烦，可借助函数的调用，版本二（calRDPI v2）如下
<!DOCTYPE html>
<html>
<body>
<h1>计算RDPI</h1>
<form id="ctrl">
<label>数组1，英文空格或逗号分割<input type="text" id="a_str" size="100"/></label><br />
<label>数组2，英文空格或逗号分割<input type="text" id="b_str" size="100"/></label><br />
<label>数组3，英文空格或逗号分割<input type="text" id="c_str" size="100"/></label><br />
<label>数组4，英文空格或逗号分割<input type="text" id="d_str" size="100"/></label><br />
<input type="button" id="submit" value="提交" />
<input type="reset" id="reset" value="重置" /><br />
<label>提示消息<input type="text" id="msg" readonly="ture" size="100" /></label>
</form>
<script>
var oSubmit = document.getElementById("submit");
var oMsg = document.getElementById("msg");
function calOnce(s1,s2){
var part_array = new Array();
var part_num = 0;
var a = s1.split(",");
var b = s2.split(",")
for (var i = 0; i < a.length; i++){
for (var j = 0; j < b.length; j++){
if(a[i] != "" && b[j] != ""){
var tmp = (Math.abs(parseFloat(a[i])-parseFloat(b[j])))/(parseFloat(a[i])+parseFloat(b[j]));
part_array.push (tmp);
part_num += tmp;
}
}
}
return [part_num,part_array];
}
oSubmit.onclick = init;
function init(){
var oA = document.getElementById("a_str");
var oB = document.getElementById("b_str");
var oC = document.getElementById("c_str");
var oD = document.getElementById("d_str");
var reg = /s+|,/;
var a = oA.value.split(reg);
var b = oB.value.split(reg);
var c = oC.value.split(reg);
var d = oD.value.split(reg);
var myData = new Array(a,b,c,d);
var sum_array = new Array();
var sum_length = 0;
var sum_num = 0;
for (var arr1 of myData){
for (var arr2 of myData){
if (arr1 != arr2){
var tmpArr = calOnce(arr1.toString(),arr2.toString());
//console.log(tmpArr[1].length)
sum_array.push (tmpArr[1]);
sum_length += tmpArr[1].length;
sum_num += tmpArr[0];
}
}
}
oMsg.value = "计算"+sum_length+"次，加和为"+sum_num+"平均数是"+sum_num/sum_length;
console.log(sum_array)
}
</script>
</body>
</html>
当有更多处理或者数据时，则需要以多行的形式一次性输入，需要扩展性更强的最终版本calRDPI v3
<!DOCTYPE html>
<html>
<body>
<h1>计算RDPI</h1>
<form id="ctrl">
<textarea rows="15" cols="100" id="str">英文空格或逗号为分隔符，换行分割数组,示例:
1,2,3,4,5,7
1 2 3 5 6
12,13,14,15
199,500</textarea><br/>
<input type="button" id="submit" value="提交" />
<input type="reset" id="reset" value="重置" /><br />
<label>提示消息<input type="text" id="msg" readonly="ture" size="100" /></label>
</form>
<script>
var oSubmit = document.getElementById("submit");
var oMsg = document.getElementById("msg");
function calOnce(s1,s2){
var part_array = new Array();
var part_num = 0;
var reg = /s+|,/;
var a = s1.split(reg);
var b = s2.split(reg)
for (var i = 0; i < a.length; i++){
for (var j = 0; j < b.length; j++){
if(a[i] != "" && b[j] != ""){
var tmp = (Math.abs(parseFloat(a[i])-parseFloat(b[j])))/(parseFloat(a[i])+parseFloat(b[j]));
part_array.push (tmp);
part_num += tmp;
}
}
}
return [part_num,part_array];
}
oSubmit.onclick = init;
function init(){
var oStr = document.getElementById("str");
var myData = oStr.value.split("
");
var sum_array = new Array();
var sum_length = 0;
var sum_num = 0;
for (var arr1 of myData){
for (var arr2 of myData){
if (arr1 != arr2){
var tmpArr = calOnce(arr1,arr2);
sum_array.push (tmpArr[1]);
sum_length += tmpArr[1].length;
sum_num += tmpArr[0];
}
}
}
oMsg.value = "计算"+sum_length+"次，加和为"+sum_num+"平均数是"+sum_num/sum_length;
console.log(sum_array)
}
</script>
</body>
</html>
在编写脚本时，发现JavaScript的Array的split(" ")方法，不仅可以识别空格，也可以识别英文逗号，但为了减少不确定性，后两个版本使用了正则/s+|,/作为定界符。
为解决浏览器编码问题，添加HTML meta信息<meta charset="utf-8">，版本v3.1如下
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="description" content="相对距离可塑性指数（RDPI）计算" />
<meta name="author" content="Lyle Liu; liulele62@163.com" />
<title>相对距离可塑性指数（RDPI）计算</title>
<body>
<h1>相对距离可塑性指数（RDPI）计算V3.1</h1>
<form id="ctrl">
<textarea rows="15" cols="100" id="str"></textarea><br/>
<input type="button" id="submit" value="提交" />
<input type="reset" id="reset" value="重置" /><br />
<label>提示消息<input type="text" id="msg" readonly="ture" size="100" /></label>
</form>
<div>
<p>说明</p>
英文空格或逗号为分隔符，换行分割数组,示例:<br/>
1,2,3,4,5,7<br/>
1 2 3 5 6<br/>
12,13,14,15<br/>
199,500<br/>
<br/>
<br/>
<p>作者：Lyle Liu<p/>
<p>邮箱：liulele622@163.com<p/>
<div>
<script>
var oSubmit = document.getElementById("submit");
var oMsg = document.getElementById("msg");
function calOnce(s1,s2){
var part_array = new Array();
var part_num = 0;
var reg = /s+|,/;
var a = s1.split(reg);
var b = s2.split(reg)
for (var i = 0; i < a.length; i++){
for (var j = 0; j < b.length; j++){
if(a[i] != "" && b[j] != ""){
var tmp = (Math.abs(parseFloat(a[i])-parseFloat(b[j])))/(parseFloat(a[i])+parseFloat(b[j]));
part_array.push (tmp);
part_num += tmp;
}
}
}
return [part_num,part_array];
}
oSubmit.onclick = init;
function init(){
var oStr = document.getElementById("str");
var myData = oStr.value.split("
");
var sum_array = new Array();
var sum_length = 0;
var sum_num = 0;
for (var arr1 of myData){
for (var arr2 of myData){
if (arr1 != arr2){
var tmpArr = calOnce(arr1,arr2);
sum_array.push (tmpArr[1]);
sum_length += tmpArr[1].length;
sum_num += tmpArr[0];
}
}
}
oMsg.value = "计算"+sum_length+"次，加和为"+sum_num+"，平均数是"+sum_num/sum_length;
console.log(sum_array)
}
</script>
</body>
</html>
v3.2增加了行数显示，并对负值进行了折中处理。
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="description" content="相对距离可塑性指数（RDPI）计算" />
<meta name="author" content="Lyle Liu; liulele62@163.com" />
<title>相对距离可塑性指数（RDPI）计算</title>
<body>
<h1>相对距离可塑性指数（RDPI）计算V3.2</h1>
<form id="ctrl">
<textarea rows="15" cols="100" id="str"></textarea><br/>
<input type="button" id="submit" value="提交" />
<input type="reset" id="reset" value="重置" /><br />
<label>提示消息<input type="text" id="msg" readonly="ture" size="100" /></label>
</form>
<div>
<p>说明</p>
英文空格或逗号为分隔符，换行分割数组,示例:<br/>
1,2,3,4,5,7<br/>
1 2 3 5 6<br/>
12,13,14,15<br/>
199,500<br/>
<br/>
<br/>
<p>作者：Lyle Liu<p/>
<p>邮箱：liulele622@163.com<p/>
<div>
<script>
var oSubmit = document.getElementById("submit");
var oMsg = document.getElementById("msg");
function calOnce(s1,s2){
var part_array = new Array();
var part_num = 0;
var reg = /s+|,/;
var a = s1.split(reg);
var b = s2.split(reg)
for (var i = 0; i < a.length; i++){
for (var j = 0; j < b.length; j++){
if(a[i] != "" && b[j] != ""){
var fA = parseFloat(a[i]);
var fB = parseFloat(b[j]);
if (fA * fB >= 0){
var tmp = (Math.abs(fA - fB))/(Math.abs(fA + fB));
}else{
fA = 2 * fB - fA;
var tmp = (Math.abs(fA - fB))/(Math.abs(fA + fB));
}
part_array.push (tmp);
part_num += tmp;
}
}
}
return [part_num,part_array];
}
oSubmit.onclick = init;
function init(){
var oStr = document.getElementById("str");
var myData = oStr.value.split("
");
var sum_array = new Array();
var sum_length = 0;
var sum_num = 0;
for (var arr1 of myData){
for (var arr2 of myData){
if (arr1 != arr2){
var tmpArr = calOnce(arr1,arr2);
sum_array.push (tmpArr[1]);
sum_length += tmpArr[1].length;
sum_num += tmpArr[0];
}
}
}
oMsg.value = "共"+myData.length+"行，计算"+sum_length+"次，加和为"+sum_num+"，平均数是"+sum_num/sum_length;
//console.log(sum_array)
}
</script>
</body>
</html>