Learner#

Most estimators have the ability to be trained with data. These estimators are called Learners and require training before they are can make predictions. Training is the process of feeding data to the learner so that it can form a generalized representation or model of the dataset.

Train a Learner#

To train a learner pass a training dataset as argument to the train() method:

public train(Dataset $training) : void

Example

$estimator->train($dataset);

Note: Calling the train() method on an already trained learner will erase its previous training. If you would like to train a model incrementally, you can do so with learners implementing the Online interface.

Is the Learner Trained?#

Return whether or not the learner has been trained:

public trained() : bool

Example

var_dump($estimator->trained());
bool(true)

Predict a Single Sample#

Pass a single sample through the model and return the prediction:

public predictSample(array $sample) : mixed

Example

$prediction = $estimator->predictSample([4, 'furry', 'loner', 8.65]);

var_dump($prediction);
string(3) "cat"