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这是我正在使用的代码：

<?php
function Median($dataPoints) {
    return Quartile_50($dataPoints);
}

function Quartile_25($dataPoints) {
    return Quartile($dataPoints, 0.25);
}

function Quartile_50($dataPoints) {
    return Quartile($dataPoints, 0.5);
}

function Quartile_75($dataPoints) {
    return Quartile($dataPoints, 0.75);
}

function Quartile($dataPoints, $Quartile) {
    sort($dataPoints);
    $pos = (count($dataPoints)-1) * $Quartile;

    $base = floor($pos);
    $rest = $pos - $base;

    if( isset($dataPoints[$base+1]) ) {
        return $dataPoints[$base] + $rest * ($dataPoints[$base+1] - $dataPoints[$base]);
    } else {
        return $dataPoints[$base];
    }
}

function Average($dataPoints) {
    return array_sum($dataPoints)/ count($dataPoints);
}

function StdDev($dataPoints) {
    if(count($dataPoints) < 2) {
        return;
    }
    $avg = Average($dataPoints);

    $sum = 0;
    foreach($dataPoints as $value) {
        $sum += pow($value - $avg, 2);
    }
    return sqrt((1/(count($dataPoints)-1))*$sum);
}

这是我收到的错误：

致命错误：未捕获错误：C:\xampp\htdocs\arraytest.php:62 中不支持的操作数类型 堆栈跟踪：#0 C:\xampp\htdocs\arraytest.php(45): Quartile(Array, 0.25) #1 C :\xampp\htdocs\arraytest.php(84): Quartile_25(Array) #2 {main} 在第 62 行的 C:\xampp\htdocs\arraytest.php 中抛出

这是第 62 行：

return $dataPoints[$base] + $rest * ($dataPoints[$base+1] - $dataPoints[$base]);

$dataPoints是我的数组，所以我认为这是因为我无法减去两个数组。当我将减法函数替换为array_diff(). 我是否正确输入了 Quartile() 函数？

谢谢您的帮助

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0 回答 0