使用名称空间与现有代码的项目

I am trying to integrate PHPML with an existing project. PHPML uses namespaces and I have little experience using them.

I am able to run PHPML directly through my controller however when integrating it in to a class method I get the following error

Parse error: syntax error, unexpected 'use' (T_USE) in... on line 4

My class method:

class learn{
  public function return_adjustments(){
    include 'application/vendor/autoload.php';
    use Phpml\Regression\LeastSquares;
    use Phpml\Exception\FileException;

    $samples = $this->csv_to_array('samples.csv');
    $targets = $this->csv_to_array('targets.csv');

    $regression = new LeastSquares();
    $regression->train($samples, $targets);
}

Is it possible to do this correctly? I'm struggling on the concept of namespaces.

Put the "use" statements at the very top of your file in order to import them properly.

include 'application/vendor/autoload.php';

class learn{
  public function return_adjustments() {

    $samples = $this->csv_to_array('samples.csv');
    $targets = $this->csv_to_array('targets.csv');

    $regression = new Phpml\Regression\LeastSquares();
    $regression->train($samples, $targets);
}