I am trying to compute the difference between all values in an array and store them (the differences) in a single array.
An ideal example would be something like this:
<?php
$data = array('1', '5', '12');
// Compute the difference between each value with another value.
?>
And then I like to have the following results in an array:
4, 11, 7
How can I achieve it?
try this
$data = array('1', '5', '12');
$differences=[];
for($i=0;$i<count($data);$i++){
for($j=$i+1;$j<count($data);$j++){
$differences[]=abs($data[$i]-$data[$j]);
}
}
print_r($differences);
results in
Array
(
[0] => 4
[1] => 11
[2] => 7
)
Check this https://3v4l.org/9oiqs
$data = [1, 5, 12, 15, 20, 25,];
function getDifferences($aValues)
{
$aDiff = [];
$iSize = count($aValues);
for ($i = 0; $i < $iSize; $i++)
{
for ($j = $i + 1; $j < $iSize; $j++)
{
$aDiff[$aValues[$i]][] = abs($aValues[$i] - $aValues[$j]);
}
}
return $aDiff;
}
function printDifferences($aValues){
foreach ($aValues as $iNumber => $aDiffs){
echo "Differences for $iNumber: " . implode(', ', $aDiffs) . PHP_EOL;
}
}
$aDiff = getDifferences($data);
printDifferences($aDiff);
Result
Differences for 1: 4, 11, 14, 19, 24
Differences for 5: 7, 10, 15, 20
Differences for 12: 3, 8, 13
Differences for 15: 5, 10
Differences for 20: 5
