计算数组中值的百分比

问题描述：

I have the following array $browser:

Array
(
    [2] => Array
        (
            [0] => Internet Explorer
            [1] => 5809
        )

    [3] => Array
        (
            [0] => Chrome
            [1] => 9205
        )

    [4] => Array
        (
            [0] => Safari
            [1] => 5288
        )

    [5] => Array
        (
            [0] => Opera
            [1] => 102
        )

Is there a way to calculate for each element the percentage . I tried this funtcion:

foreach ($browser as $key => $value){
print_array(array_avg($browser[$key][1]) );
    }

function array_avg($array, $round=1){
$num = count($array);
return array_map(
    function($val) use ($num,$round){
        return array('count'=>$val,'avg'=>round($val/$num*100, $round));
    },
    array_count_values($array));
}

Is there an error in my code? Thanks!

我有以下数组$ browser code>： p> Array （ [2] =＆gt; Array （ [0] =＆gt; Internet Explorer [1] =＆gt; 5809 ） [3] =＆gt;数组（ [0] =＆gt; Chrome [1] =＆gt; 9205 ） [4] =＆gt;数组（ [0] =＆gt; Safari [1] =＆gt; 5288 ） [5] =＆gt;数组（ [0] =＆gt; Opera [1] =＆gt; 102 ） code> pre>

有没有办法计算每个元素的百分比。我尝试了这个功能： p>


  foreach（$ browser）  as $ key =＆gt; $ value）{
print_array（array_avg（$ browser [$ key] [1]））; 
} 
 
function array_avg（$ array，$ round = 1）{
 $ num =  count（$ array）; 
return array_map（
 function（$ val）use（$ num，$ round）{
 return array（'count'=＆gt; $ val，'avg'=＆gt; round（$ val）  / $ num * 100，$ round））; 
}，
 array_count_values（$ ar  ray））; 
} 
  code>  pre> 
 
 我的代码中是否有错误？
谢谢！ p> 
  div>

答

Try something like this:

// calculate the sum; first transform the array in something with only integers, then sum that array
$sum = array_sum(array_map(function ($a) { return $a[1]; }, $browser));

// walk through the array, print the percentage (value / sum) for each browser
foreach ($browser as $info) {
    echo 'Percentage for browser '.$info[0].' = '.round(($info[1]/$sum)*100).'%<br>';
}

计算数组中值的百分比

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