我正在忙着写一个简单的算法来模糊匹配来自两个数据集的地址。我正在计算两个地址之间的levenshtein距离,然后将精确匹配或最短匹配添加到匹配数组。模糊匹配地址
然而,这是非常缓慢的,因为在最坏的情况下,它必须将每个旧地址与每个新地址进行比较。
我目前的解决方案如下:
matches = [];
foreach ($classifications as $classification)
{
$classification = $stringMatchingService->standardize($classification, $stringMatchingService->isClassification());
$shortest = -1;
$closest = '';
$cnt = 0;
foreach ($lines as $line)
{
$line = $stringMatchingService->standardize($line, $stringMatchingService->isRTT());
if ($classification[CLASSIFICATION_POSTCODE] != $line[RTT_POSTCODE]) {
continue;
}
$lev = levenshtein($classification[CLASSIFICATION_SUBURB], $line[RTT_SUBURB]);
if ($lev == 0) {
$matches[$classification[CLASSIFICATION_SUBURB]] = $line[RTT_SUBURB];
$cnt++;
break;
}
if ($lev <= $shortest || $shortest < 0) {
//set the closest match and distance
$closest = $line[RTT_SUBURB];
$shortest = $lev;
}
if ($cnt == count($lines)) {
$matches[$classification[CLASSIFICATION_SUBURB]] = $closest;
}
$cnt++;
}
}
print_r(count($matches));
注意,标准化功能只是试图通过去除不相关的信息和填补邮政编码规范的地址。
但是,我想知道如何加快这一进程,因为目前它非常昂贵,或者如果有更好的方法可以采取?
任何帮助表示赞赏,
谢谢!
编辑: 的$大小分类为12000行和$行大小17000行。该标准化功能如下:
public function standardize($line, $dataSet)
{
switch ($dataSet) {
case self::CLASSIFICATIONS:
if (!isset($line[9], $line[10]) || empty($line[9]) || empty($line[10])) {
continue;
}
$suburb = $line[9];
$suburb = strtoupper($suburb);
$suburb = str_replace('EXT', '', $suburb);
$suburb = str_replace('UIT', '', $suburb);
$suburb = preg_replace('/[0-9]+/', '', $suburb);
$postCode = $line[10];
$postCode = str_pad($postCode, 4,'0', STR_PAD_LEFT);
$line[9] = $suburb;
$line[10] = $postCode;
return $line;
case self::RTT:
if (!isset($line[1], $line[0]) || empty($line[1]) || empty($line[0])) {
continue;
}
$suburb = $line[1];
$suburb = strtoupper($suburb);
$suburb = str_replace('EXT', '', $suburb);
$suburb = str_replace('UIT', '', $suburb);
$suburb = preg_replace('/[0-9]+/', '', $suburb);
$postCode = $line[0];
$postCode = str_pad($postCode, 4,'0', STR_PAD_LEFT);
$line[1] = $suburb;
$line[0] = $postCode;
return $line;
}
它只是旨在适当地访问数据,并删除某些关键字,垫后的代码,如果它不是在格式XXXX。
什么的'$ classifications'大小?愿你的'standardize'方法添加到编辑。请粘贴数据示例 – ceadreak
编辑该问题! – liamjnorman