我有一个这样的数组
Array (
[0] => Array ( [id_doc] => 1 [term] => curi )
[1] => Array ( [id_doc] => 1 [term] => tidur )
[2] => Array ( [id_doc] => 1 [term] => kamar )
[3] => Array ( [id_doc] => 2 [term] => curi )
[4] => Array ( [id_doc] => 2 [term] => cela )
[5] => Array ( [id_doc] => 2 [term] => hukum )
[6] => Array ( [id_doc] => 3 [term] => nyanyi )
[7] => Array ( [id_doc] => 3 [term] => dangdut )
[8] => Array ( [id_doc] => 3 [term] => curi )
)
如何从这些文档上的术语中获取文档频率的计数。我想要这样的输出。
Array (
[0] => Array ( [id_doc] => 1 [term] => curi [doc_frequency] => 3 )
[1] => Array ( [id_doc] => 1 [term] => tidur [doc_frequency] => 1 )
[2] => Array ( [id_doc] => 1 [term] => kamar [doc_frequency] => 1 )
[3] => Array ( [id_doc] => 2 [term] => curi [doc_frequency] => 3 )
[4] => Array ( [id_doc] => 2 [term] => cela [doc_frequency] => 1 )
[5] => Array ( [id_doc] => 2 [term] => hukum [doc_frequency] => 1 )
[6] => Array ( [id_doc] => 3 [term] => nyanyi [doc_frequency] => 1 )
[7] => Array ( [id_doc] => 3 [term] => dangdut [doc_frequency] => 1 )
[8] => Array ( [id_doc] => 3 [term] => curi [doc_frequency] => 3 )
)
所以术语“curi”有 3 个文档频率，因为它出现在 3 个文档中。我试过这个
$count_df = array_count_values(array_map(function($item) {
return $item['term'];
}, $dokumen_frek));
print_r($count_df);
但结果是
Array (
[curi] => 3
[tidur] => 1
[kamar] => 1
[cela] => 1
[hukum] => 1
[nyanyi] => 1
[dangdut] => 1
)
$terms = array_count_values(array_column($arr, 'term'));
foreach($arr as &$x) {
$x['doc_frequency'] = $terms[$x['term']];
}
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