CODEWITHSUNDEEP
php
Amro Awad
Amro Awad

Reputation: 35

How do I add a moving average?

The moving averages based on 5 numbers of these win numbers is a moving part. So if the win numbers are: 3-4-5-6-7-8-4-5-6-33-23-12-5-1 Then the first moving average is based on 3-4-5-6-7 divided by 5 Then the second moving average is based on 4-5-6-7-8 divided by 5 Then the third moving average is based on 5-6-7-8-4 divided by 5

I tried creating a array but it didnt work.

<?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>";



?>

Upvotes: 0

Views: 965

Answers (2)

A l w a y s S u n n y
A l w a y s S u n n y

Reputation: 38542

You can do this way, Also it can be optimize with couple of methods like array_sum() and array_slice()

<?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));
?>

WORKING DEMO: https://3v4l.org/GO0Ai

Upvotes: 2

Andreas
Andreas

Reputation: 23958

If you loop the array with a for loop and use array_slice then you can get a rolling average.

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

Example: https://3v4l.org/XUdlP

Upvotes: 0

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