如何平均每100个块的数组 [英] How to average array per 100 chunks

问题描述

我想知道如何将数组拆分为100个块，然后对这些块中的值求平均值.我远不及使用array_chunk，但无法弄清楚如何平均这些块中的值.这只是我数组的一小部分:

I'm wondering how to split an array into 100 chunks and then average the values in those chunks. I came as far as using array_chunk but can't figure out how to average the value in those chunks. This is a small part of my array:

Array ( [0] => 70 [1] => 70 [2] => 70 [3] => 69 [4] => 69 [5] => 69 [6] => 70 [7] => 70 [8] => 70 [9] => 69 [10] => 69 [11] => 70 [12] => 70 [13] => 69 [14] => 70 [15] => 69 [16] => 69 [17] => 70 [18] => 69 [19] => 69 [20] => 69 [21] => 69 [22] => 69  ...

我想要的是以下内容:

[0] => 70(数组中前100个值的平均值)

[0] = > 70 (Average of the first 100 values in the array)

依此类推

预先感谢

推荐答案

$arr = array_chunk(array(1,2,3,4,5,6,7,8,9), 3);

while ($chunk = array_shift($arr)) {
    echo array_sum($chunk) / count($chunk) . PHP_EOL;
}

http://codepad.org/uaY1ziEI

赠予:

2
5
8

如果将其更改为每个块 4 :

And if you change it to 4 per chunk:

2.5
6.5
9

http://codepad.org/srGW4Rmq

100个块:

$arr = range(1, 16734, 1);
$arr = array_chunk($arr, ceil(count($arr) / 100));

while ($chunk = array_shift($arr)) {
    echo array_sum($chunk) / count($chunk) . PHP_EOL;
}

http://codepad.org/t1n9VE35

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