所以我在這個(gè)數(shù)組代碼中
$numers = array ( array(198,208,109,11,636), array(198,188,84,55,756), array(194,206,113,13,531), array(184,213,127,18,101), array(194,213,127,23,110), array(984,213,127,44,125), array(184,213,127,88,980), array(995,211,129,63,888) );
現(xiàn)在我想計(jì)算第二列（208, 188, 206, 213, 213, 213, 213, 211）的列平均值（從第一個(gè)198, 198, 194, 184, 194, 984, 184, 995）依此類推，直到倒數(shù)第五列。
我不知道該怎么做，所以有人可以向我解釋如何計(jì)算每列的列平均值。
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<?php
$numers = array(
array(198,208,109,11,636),
array(198,188,84,55,756),
array(194,206,113,13,531),
array(184,213,127,18,101),
array(194,213,127,23,110),
array(984,213,127,44,125),
array(184,213,127,88,980),
array(995,211,129,63,888)
);
$num_cols = count($numers[0]);
for ($i = 0; $i < $num_cols; $i++) {
$column = array_column($numers, $i);
$average = array_sum($column) / count($column);
echo "Column $i average: $average<br>";
}
輸出：
Column 0 average: 391.375 Column 1 average: 208.125 Column 2 average: 117.875 Column 3 average: 39.375 Column 4 average: 515.875
