如何从foreach循环中获取以下情况的sum:
price = Array
(
[0] => Array
(
[0] => 100
[1] => 200
)
[1] => Array
(
[0] => 300
[1] => 400
)
)
如何得到每个元素的平均值和?我需要添加
avg1 = price[0][0] + price[1][0] .... + price[N][0]
avg2 = price[0][1] + price[1][1] .... + price[N][1]
然后除以元素个数。由于
试试这个
<?php
$price = array
(
0 => array
(
0 => 100,
1 => 200,
),
1 => array
(
0 => 300,
1 => 400,
)
);
$a = 0;
$b = 0;
$i = 0;
foreach($price as $p)
{
$a += $p[0];
$b += $p[1];
$i++;
}
echo 'Avg of a= '. ($a/$i).PHP_EOL;
echo 'Avg of b= '. ($b/$i).PHP_EOL;
?>
这是一个简单的线索....你可以根据自己的想法构建它
<?php
$price = array();
$price[0][0] = 100;
$price[0][1] = 200;
$price[1][0] = 300;
$price[1][1] = 400;
$price[2][0] = 500;
$price[2][1] = 600;
$sum1 = 0; $sum2 = 0;
$count1 = 0; $count2 = 0;
foreach($price as $array){
if (isset($array[0])){
$sum1+=$array[0];
$count1++;
}
if (isset($array[1])){
$sum2+=$array[1];
$count2++;
}
}
$ave1 = sprintf("%2.f", $sum1/$count1);
$ave2 = sprintf("%2.f", $sum2/$count2);
print "$ave1'n$ave2'n'n";
?>
for($i =0; $i < count($i): $i++){
$avg = 0;
for($j =0; $i < $j: $j++){
$avg = $avg + $price[$j][$i] ;
}
echo "avg$i: $avg";
}