矩阵

作者: 2359634711 | 来源:发表于2019-03-28 19:50 被阅读0次

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>work</title>
</head>
<body>
<div>
    <input type="" name="" id="inputA" placeholder="输入a" value="1 2 3 4 5">
</div>
<div>
    <input type="" name="" id="inputB" placeholder="输入b" value="1 1 1 1">
</div>
<div>
    <input type="" name="" id="inputC" placeholder="输入c" value="1 1 1 1">
</div>

<div>
    <input type="" name="" id="inputD" placeholder="输入d" value="3 8 15 24 29">
</div>




<button onclick="getInput()">计算</button>



<div id="out"></div>


<script type="text/javascript">
    
    function getInput(){
        var a_d = document.getElementById('inputA');
        a = a_d.value.split(' ');
        var b_d = document.getElementById('inputB');
        b = b_d.value.split(' ');
        var c_d = document.getElementById('inputC');
        c = c_d.value.split(' ');
        var d_d = document.getElementById('inputD');
        d = d_d.value.split(' ');
        Fun(a, b, c, d);


    }
    function Fun(a, b, c, d){

        /*
        var a_arr = [
        [1, 1, 0, 0, 0],
        [1, 2, 1, 0, 0],
        [0, 1, 3, 1, 0],
        [0, 0, 1, 4, 1],
        [0, 0, 0, 1, 5]
        ]*/

/*
        var a = [1, 2, 3, 4, 5];
        var c = [1, 1, 1, 1];
        var b = [1, 1, 1, 1];
        var d = [3, 8, 15, 24, 29];
*/

        var i = [];
        var u = [];
        var y = [];
        for (var k = 0; k < 5; k ++ ){
            if(k == 0){
                i[k] = a[0];
                y[k] = d[0] / i[k];
                continue;
            }
            u[k - 1] = b[k - 1] / i[k - 1];
            i[k] = a[k] - c[k - 1] * u[k - 1];
            y[k] = (d[k] - c[k - 1] * y[k-1]) / i[k];
        }

var p =[]
        for (var k = 4; k >=0; k --) {
            if(k == 4){
                p[k] = (y[k]).toFixed(2);
                continue;
            }
            p[k] = (y[k] - u[k] * p[k + 1]).toFixed(2);


        }


        console.log(p);

        var s = document.getElementById('out');
        s.innerText = p;



    }


</script>
</body>
</html>