public function testComplexCase()
{
$r = new LinearRegression(Dataset::fromArray([0.5, 1, 4, -1]));
$this->assertSame(-0.15, $r->slope());
$this->assertSame(1.35, $r->intercept());
$this->assertSame(0.0, $r(9));
}
public function get($id)
{
$this->queryDataset->bindValue(':id', intval($id), PDO::PARAM_INT);
$this->queryDataset->execute();
$datasets = $this->queryDataset->fetchAll(PDO::FETCH_ASSOC);
$numDatasets = count($datasets);
$this->queryDataset->closeCursor();
if ($numDatasets < 1) {
throw new Exception(self::$EXCEPTION_NO_DATASET);
} else {
if ($numDatasets > 1) {
throw new Exception(self::$EXCEPTION_MULT_DATASETS);
} else {
$dataset = $datasets[0];
$dataset['iml'] = $this->_dbStringToArray($dataset['iml']);
return Dataset::fromArray($dataset);
}
}
}
public function testFromArray()
{
$dataset = Dataset::fromArray([1, 2, 3, [3.2, 4]]);
$this->assertInstanceOf(Dataset::class, $dataset);
$this->assertSame([[0.0, 1.0], [1.0, 2.0], [2.0, 3.0], [3.2, 4.0]], $dataset->toArray());
}