public function testComputeSimilarity2()
{
$instance = new KNNModelBuilder(null, new CosineSimilarity());
$source = new ObjectSet(Rating::class);
$destination = new ObjectSet(Rating::class);
$node1 = new FakeNode(1);
$node2 = new FakeNode(2);
$node3 = new FakeNode(3);
$node4 = new FakeNode(4);
$node5 = new FakeNode(5);
$source->add(new Rating(1, $node1->identity()));
$source->add(new Rating(3, $node4->identity()));
$destination->add(new Rating(1, $node2->identity()));
$destination->add(new Rating(2, $node4->identity()));
$destination->add(new Rating(5, $node5->identity()));
$similarity = $instance->computeSimilarity($source, $destination);
$this->assertTrue($similarity >= 0.34641016 && $similarity <= 0.346410161514);
}
$stopwatch->start("e");
$result = $driver->run($qA);
$e = $stopwatch->stop("e");
echo $e->getDuration() . PHP_EOL;
$stopwatch->start("simil");
$pairs = [];
$crs = array_chunk($result->records(), 100);
foreach ($result->records() as $record) {
$source = new ObjectSet(Rating::class);
$m = $record->value("m");
foreach ($record->value("ratings") as $rating) {
$source->add(new Rating($rating['rating'], $rating['user']));
}
foreach ($crs as $cr) {
foreach ($cr as $record2) {
$m2 = $record2->value("m");
$k = $m + $m2;
if (!array_key_exists($k, $pairs) && $record2->value("m") !== $record->value("m")) {
$destination = new ObjectSet(Rating::class);
foreach ($record2->value("ratings") as $rating2) {
$destination->add(new Rating($rating2['rating'], $rating2['user']));
}
$simil = $knn->computeSimilarity($source, $destination);
$pairs[$k] = ['source' => $record->value("m"), 'desc' => $record2->value("m"), 'similarity' => $simil];
//echo $simil . PHP_EOL;
}
}
}
}
$e2 = $stopwatch->stop("simil");
echo $e2->getDuration() . PHP_EOL;
