如何添加移动平均线

Question

基于

这些中奖号码的 5 个数字的移动平均线是一个移动部分。因此，如果中奖号码为：3-4-5-6-7-8-4-5-6-33-23-12-5-1然后第一条移动平均线基于 3-4-5-6-7 除以 5然后第二个移动平均线基于 4-5-6-7-8 除以 5然后第三条移动平均线基于 5-6-7-8-4 除以 5

我尝试创建一个数组，但它不起作用。

<?php
$existing = [];
$win_numbers = [];
for ($rnd=1;$rnd<=250;$rnd++)
{
  $randoms[] = mt_rand(0,36);  // see this block for generating randoms
}
echo "Random Numbers:<br>";
echo implode('-', $randoms).PHP_EOL;
echo "<br><br>";
$i = 0;
foreach($randoms as $rnd){
   $i++; 
   if(in_array($rnd,$existing)){
       $win_numbers[] = $i;
       $i=1;
       $existing = [];
   }
   $existing[] = $rnd; 
}
echo "Win Numbers:<br>";
echo implode('-',$win_numbers);
echo "<br><br>";
echo "Moving Averages:<br>";

?>

Answer 1

你可以

这样做，也可以用array_sum()和array_slice()等几种方法进行优化

<?php
// Function to print moving average
function movingAverage($win_numbers, $average_for)  
{ 
    foreach($win_numbers as $key=>$value){
      $win_number_consecutive_5 = array_slice($win_numbers, $key, $average_for);
      if(count($win_number_consecutive_5) == $average_for) {
      $win_averages[] = array_sum($win_number_consecutive_5) / $average_for;
  }
    }
    return $win_averages;
} 
echo "Moving Averages:<br>";
$win_numbers = explode('-','3-4-5-6-7-8-4-5-6-33-23-12-5-1');
$average_for = 5;
echo implode('-',movingAverage($win_numbers, $average_for));
?>

工作演示：https://3v4l.org/GO0Ai

Answer 2

如果使用 for 循环循环数组并使用array_slice则可以获得滚动平均值。

for($i=0;$i<count($randoms)-4;$i++){
    $avg[] = array_sum(array_slice($randoms, $i, 5))/5;
}

示例：https://3v4l.org/XUdlP