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stemflow.model.Hurdle

Hurdle

Bases: BaseEstimator

A simple Hurdle model class

Source code in stemflow/model/Hurdle.py 
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class Hurdle(BaseEstimator):
    """A simple Hurdle model class"""

    def __init__(self, classifier: BaseEstimator, regressor: BaseEstimator):
        """Make a Hurdle class object

        Args:
            classifier:
                A sklearn style classifier estimator. Must have `fit` and `predict` methods.
                Will be better if it has `predict_proba` method, which returns a numpy array of shape (n_sample, 2)
            regressor:
                A sklearn style regressor estimator. Must have `fit` and `predict` methods.

        Example:
            ```
            >> from xgboost import XGBClassifier, XGBRegressor
            >> from stemflow.model.Hurdle import Hurdle
            >> model = Hurdle(classifier = XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
                              regressor = XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1))
            >> model.fit(X_train, y_train)
            >> pred = model.predict(X_test)
            >> ...

            ```

        """
        self.classifier = classifier
        self.regressor = regressor

    def fit(self, X_train: Union[pd.core.frame.DataFrame, np.ndarray], y_train: Sequence, sample_weight=None):
        """Fitting model

        Args:
            X_train:
                Training variables
            y_train:
                Training target

        """
        binary_ = np.unique(np.where(y_train > 0, 1, 0))
        if len(binary_) == 1:
            warnings.warn("Warning: only one class presented. Replace with dummy classifier & regressor.")
            self.classifier = dummy_model1(binary_[0])
            self.regressor = dummy_model1(binary_[0])
            return

        new_dat = np.concatenate([np.array(X_train), np.array(y_train).reshape(-1, 1)], axis=1)
        if not isinstance(sample_weight, type(None)):
            self.classifier.fit(new_dat[:, :-1], np.where(new_dat[:, -1] > 0, 1, 0), sample_weight=sample_weight)
        else:
            self.classifier.fit(new_dat[:, :-1], np.where(new_dat[:, -1] > 0, 1, 0))

        regressor_y = new_dat[new_dat[:, -1] > 0, :][:, -1].reshape(-1, 1)
        if regressor_y.shape[0] <= 1:
            self.regressor = dummy_model1(regressor_y[0][0])
        else:
            self.regressor.fit(new_dat[new_dat[:, -1] > 0, :][:, :-1], np.array(regressor_y))

        try:
            self.feature_importances_ = (
                np.array(self.classifier.feature_importances_) + np.array(self.regressor.feature_importances_)
            ) / 2
        except Exception as e:
            warnings.warn(f"Cannot calculate feature importance: {e}")
            pass

    def predict(self, X_test: Union[pd.core.frame.DataFrame, np.ndarray]) -> np.ndarray:
        """Predicting

        Args:
            X_test: Test variables

        Returns:
            A prediction array with shape (-1,1)
        """
        cls_res = self.classifier.predict(X_test)
        reg_res = self.regressor.predict(X_test)
        # reg_res = np.where(reg_res>=0, reg_res, 0) ### we constrain the reg value to be positive
        res = np.where(cls_res > 0, reg_res, cls_res)
        return res.reshape(-1, 1)

    def predict_proba(self, X_test: Union[pd.core.frame.DataFrame, np.ndarray]) -> np.ndarray:
        """Predicting probability

        This method output a numpy array with shape (n_sample, 2)
        However, user should notice that this is only for structuring the sklearn predict_proba-like method
        Only the res[:,1] is meaningful, aka the last dimension in the two dimensions. The first dimension is always zero.

        Args:
            X_test:
                Testing variables

        Returns:
            Prediction results with shape (n_samples, 2)
        """
        a = np.zeros(len(X_test)).reshape(-1, 1)
        b = self.predict(X_test).reshape(-1, 1)
        res = np.concatenate([a, b], axis=1)
        return res

__init__(classifier, regressor)

Make a Hurdle class object

Parameters:

  • classifier (BaseEstimator) –

    A sklearn style classifier estimator. Must have fit and predict methods. Will be better if it has predict_proba method, which returns a numpy array of shape (n_sample, 2)

  • regressor (BaseEstimator) –

    A sklearn style regressor estimator. Must have fit and predict methods.

Example 
>> from xgboost import XGBClassifier, XGBRegressor
>> from stemflow.model.Hurdle import Hurdle
>> model = Hurdle(classifier = XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
                  regressor = XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1))
>> model.fit(X_train, y_train)
>> pred = model.predict(X_test)
>> ...
Source code in stemflow/model/Hurdle.py 
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def __init__(self, classifier: BaseEstimator, regressor: BaseEstimator):
    """Make a Hurdle class object

    Args:
        classifier:
            A sklearn style classifier estimator. Must have `fit` and `predict` methods.
            Will be better if it has `predict_proba` method, which returns a numpy array of shape (n_sample, 2)
        regressor:
            A sklearn style regressor estimator. Must have `fit` and `predict` methods.

    Example:
        ```
        >> from xgboost import XGBClassifier, XGBRegressor
        >> from stemflow.model.Hurdle import Hurdle
        >> model = Hurdle(classifier = XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
                          regressor = XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1))
        >> model.fit(X_train, y_train)
        >> pred = model.predict(X_test)
        >> ...

        ```

    """
    self.classifier = classifier
    self.regressor = regressor

fit(X_train, y_train, sample_weight=None)

Fitting model

Parameters:

  • X_train (Union[DataFrame, ndarray]) –

    Training variables

  • y_train (Sequence) –

    Training target

Source code in stemflow/model/Hurdle.py 
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def fit(self, X_train: Union[pd.core.frame.DataFrame, np.ndarray], y_train: Sequence, sample_weight=None):
    """Fitting model

    Args:
        X_train:
            Training variables
        y_train:
            Training target

    """
    binary_ = np.unique(np.where(y_train > 0, 1, 0))
    if len(binary_) == 1:
        warnings.warn("Warning: only one class presented. Replace with dummy classifier & regressor.")
        self.classifier = dummy_model1(binary_[0])
        self.regressor = dummy_model1(binary_[0])
        return

    new_dat = np.concatenate([np.array(X_train), np.array(y_train).reshape(-1, 1)], axis=1)
    if not isinstance(sample_weight, type(None)):
        self.classifier.fit(new_dat[:, :-1], np.where(new_dat[:, -1] > 0, 1, 0), sample_weight=sample_weight)
    else:
        self.classifier.fit(new_dat[:, :-1], np.where(new_dat[:, -1] > 0, 1, 0))

    regressor_y = new_dat[new_dat[:, -1] > 0, :][:, -1].reshape(-1, 1)
    if regressor_y.shape[0] <= 1:
        self.regressor = dummy_model1(regressor_y[0][0])
    else:
        self.regressor.fit(new_dat[new_dat[:, -1] > 0, :][:, :-1], np.array(regressor_y))

    try:
        self.feature_importances_ = (
            np.array(self.classifier.feature_importances_) + np.array(self.regressor.feature_importances_)
        ) / 2
    except Exception as e:
        warnings.warn(f"Cannot calculate feature importance: {e}")
        pass

predict(X_test)

Predicting

Parameters:

  • X_test (Union[DataFrame, ndarray]) –

    Test variables

Returns:

  • ndarray –

    A prediction array with shape (-1,1)

Source code in stemflow/model/Hurdle.py 
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def predict(self, X_test: Union[pd.core.frame.DataFrame, np.ndarray]) -> np.ndarray:
    """Predicting

    Args:
        X_test: Test variables

    Returns:
        A prediction array with shape (-1,1)
    """
    cls_res = self.classifier.predict(X_test)
    reg_res = self.regressor.predict(X_test)
    # reg_res = np.where(reg_res>=0, reg_res, 0) ### we constrain the reg value to be positive
    res = np.where(cls_res > 0, reg_res, cls_res)
    return res.reshape(-1, 1)

predict_proba(X_test)

Predicting probability

This method output a numpy array with shape (n_sample, 2) However, user should notice that this is only for structuring the sklearn predict_proba-like method Only the res[:,1] is meaningful, aka the last dimension in the two dimensions. The first dimension is always zero.

Parameters:

  • X_test (Union[DataFrame, ndarray]) –

    Testing variables

Returns:

  • ndarray –

    Prediction results with shape (n_samples, 2)

Source code in stemflow/model/Hurdle.py 
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def predict_proba(self, X_test: Union[pd.core.frame.DataFrame, np.ndarray]) -> np.ndarray:
    """Predicting probability

    This method output a numpy array with shape (n_sample, 2)
    However, user should notice that this is only for structuring the sklearn predict_proba-like method
    Only the res[:,1] is meaningful, aka the last dimension in the two dimensions. The first dimension is always zero.

    Args:
        X_test:
            Testing variables

    Returns:
        Prediction results with shape (n_samples, 2)
    """
    a = np.zeros(len(X_test)).reshape(-1, 1)
    b = self.predict(X_test).reshape(-1, 1)
    res = np.concatenate([a, b], axis=1)
    return res

Hurdle_for_AdaSTEM

Bases: BaseEstimator

Source code in stemflow/model/Hurdle.py 
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class Hurdle_for_AdaSTEM(BaseEstimator):
    def __init__(self, classifier: BaseEstimator, regressor: BaseEstimator):
        """Make a Hurdle_for_AdaSTEM class object

        Normally speaking, AdaSTEMClassifier and AdaSTEMRegressor should be passed here if using this class.

        Args:
            classifier:
                A sklearn style classifier estimator (should be AdaSTEMClassifier here). Must have `fit` and `predict` methods.
                Will be better if it has `predict_proba` method, which returns a numpy array of shape (n_sample, 2)
            regressor:
                A sklearn style regressor estimator (should be AdaSTEMRegressor here). Must have `fit` and `predict` methods.

        Example:
            ```
            >> from stemflow.model.AdaSTEM import AdaSTEM, AdaSTEMClassifier, AdaSTEMRegressor
            >> from stemflow.model.Hurdle import Hurdle_for_AdaSTEM
            >> from xgboost import XGBClassifier, XGBRegressor

            >> SAVE_DIR = './'

            >> model = Hurdle_for_AdaSTEM(
            ...     classifier=AdaSTEMClassifier(base_model=XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
            ...                                 save_gridding_plot = True,
            ...                                 ensemble_fold=10,
            ...                                 min_ensemble_required=7,
            ...                                 grid_len_lon_upper_threshold=25,
            ...                                 grid_len_lon_lower_threshold=5,
            ...                                 grid_len_lat_upper_threshold=25,
            ...                                 grid_len_lat_lower_threshold=5,
            ...                                 points_lower_threshold=50,
            ...                                 Spatio1='longitude',
            ...                                 Spatio2 = 'latitude',
            ...                                 Temporal1 = 'DOY',
            ...                                 use_temporal_to_train=True),
            ...     regressor=AdaSTEMRegressor(base_model=XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
            ...                                 save_gridding_plot = True,
            ...                                 ensemble_fold=10,
            ...                                 min_ensemble_required=7,
            ...                                 grid_len_lon_upper_threshold=25,
            ...                                 grid_len_lon_lower_threshold=5,
            ...                                 grid_len_lat_upper_threshold=25,
            ...                                 grid_len_lat_lower_threshold=5,
            ...                                 points_lower_threshold=50,
            ...                                 Spatio1='longitude',
            ...                                 Spatio2 = 'latitude',
            ...                                 Temporal1 = 'DOY',
            ...                                 use_temporal_to_train=True)
            ... )

            >> ## fit
            >> model.fit(X_train.reset_index(drop=True), y_train)

            >> ## predict
            >> pred = model.predict(X_test)
            >> pred = np.where(pred<0, 0, pred)
            >> eval_metrics = AdaSTEM.eval_STEM_res('hurdle',y_test, pred_mean)
            >> print(eval_metrics)


            ```

        """

        self.classifier = classifier
        self.regressor = regressor

    def fit(self, X_train: Union[pd.core.frame.DataFrame, np.ndarray], y_train: Sequence, verbosity: int = 1):
        """Fitting model
        Args:
            X_train:
                Training variables
            y_train:
                Training target
            verbosity:
                Whether to show progress bar. 0 for No, and Yes other wise.

        """
        binary_ = np.unique(np.where(y_train > 0, 1, 0))
        if len(binary_) == 1:
            warnings.warn("Warning: only one class presented. Replace with dummy classifier & regressor.")
            self.classifier = dummy_model1(binary_[0])
            self.regressor = dummy_model1(binary_[0])
            return

        X_train["y_train"] = y_train

        if verbosity == 0:
            self.classifier.fit(X_train.iloc[:, :-1], np.where(X_train.iloc[:, -1].values > 0, 1, 0), verbosity=0)
            self.regressor.fit(
                X_train[X_train["y_train"] > 0].iloc[:, :-1],
                np.array(X_train[X_train["y_train"] > 0].iloc[:, -1]),
                verbosity=0,
            )
        else:
            self.classifier.fit(X_train.iloc[:, :-1], np.where(X_train.iloc[:, -1].values > 0, 1, 0), verbosity=1)
            self.regressor.fit(
                X_train[X_train["y_train"] > 0].iloc[:, :-1],
                np.array(X_train[X_train["y_train"] > 0].iloc[:, -1]),
                verbosity=1,
            )

    def predict(
        self,
        X_test: Union[pd.core.frame.DataFrame, np.ndarray],
        njobs: int = 1,
        verbosity: int = 1,
        return_by_separate_ensembles: bool = False,
    ) -> np.ndarray:
        """Predict

        Args:
            X_test:
                Test variables
            njobs:
                Multi-processing in prediction.
            verbosity:
                Whether to show progress bar. 0 for No, and Yes other wise.
            return_by_separate_ensembles (bool, optional):
                Test function. return not by aggregation, but by separate ensembles.

        Returns:
            A prediction array with shape (-1,1)
        """
        if verbosity == 0:
            cls_res = self.classifier.predict(
                X_test, njobs=njobs, verbosity=0, return_by_separate_ensembles=return_by_separate_ensembles
            )
            reg_res = self.regressor.predict(
                X_test, njobs=njobs, verbosity=0, return_by_separate_ensembles=return_by_separate_ensembles
            )
        else:
            cls_res = self.classifier.predict(
                X_test, njobs=njobs, verbosity=1, return_by_separate_ensembles=return_by_separate_ensembles
            )
            reg_res = self.regressor.predict(
                X_test, njobs=njobs, verbosity=1, return_by_separate_ensembles=return_by_separate_ensembles
            )
        # reg_res = np.where(reg_res>=0, reg_res, 0) ### we constrain the reg value to be positive
        res = np.where(cls_res < 0.5, 0, cls_res)
        res = np.where(cls_res > 0.5, reg_res, cls_res)
        return res.reshape(-1, 1)

    def predict_proba(
        self,
        X_test: Union[pd.core.frame.DataFrame, np.ndarray],
        njobs: int = 1,
        verbosity: int = 0,
        return_by_separate_ensembles: bool = False,
    ) -> np.ndarray:
        """Just a rewrite of `predict` method

        Args:
            X_test:
                Testing variables
            njobs:
                Multi-processing in prediction.
            verbosity:
                Whether to show progress bar. 0 for No, and Yes other wise.
            return_by_separate_ensembles (bool, optional):
                Test function. return not by aggregation, but by separate ensembles.

        Returns:
            A prediction array with shape (-1,1)
        """

        return self.predict(
            self, X_test, njobs=njobs, verbosity=verbosity, return_by_separate_ensembles=return_by_separate_ensembles
        )

__init__(classifier, regressor)

Make a Hurdle_for_AdaSTEM class object

Normally speaking, AdaSTEMClassifier and AdaSTEMRegressor should be passed here if using this class.

Parameters:

  • classifier (BaseEstimator) –

    A sklearn style classifier estimator (should be AdaSTEMClassifier here). Must have fit and predict methods. Will be better if it has predict_proba method, which returns a numpy array of shape (n_sample, 2)

  • regressor (BaseEstimator) –

    A sklearn style regressor estimator (should be AdaSTEMRegressor here). Must have fit and predict methods.

Example 
>> from stemflow.model.AdaSTEM import AdaSTEM, AdaSTEMClassifier, AdaSTEMRegressor
>> from stemflow.model.Hurdle import Hurdle_for_AdaSTEM
>> from xgboost import XGBClassifier, XGBRegressor

>> SAVE_DIR = './'

>> model = Hurdle_for_AdaSTEM(
...     classifier=AdaSTEMClassifier(base_model=XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
...                                 save_gridding_plot = True,
...                                 ensemble_fold=10,
...                                 min_ensemble_required=7,
...                                 grid_len_lon_upper_threshold=25,
...                                 grid_len_lon_lower_threshold=5,
...                                 grid_len_lat_upper_threshold=25,
...                                 grid_len_lat_lower_threshold=5,
...                                 points_lower_threshold=50,
...                                 Spatio1='longitude',
...                                 Spatio2 = 'latitude',
...                                 Temporal1 = 'DOY',
...                                 use_temporal_to_train=True),
...     regressor=AdaSTEMRegressor(base_model=XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
...                                 save_gridding_plot = True,
...                                 ensemble_fold=10,
...                                 min_ensemble_required=7,
...                                 grid_len_lon_upper_threshold=25,
...                                 grid_len_lon_lower_threshold=5,
...                                 grid_len_lat_upper_threshold=25,
...                                 grid_len_lat_lower_threshold=5,
...                                 points_lower_threshold=50,
...                                 Spatio1='longitude',
...                                 Spatio2 = 'latitude',
...                                 Temporal1 = 'DOY',
...                                 use_temporal_to_train=True)
... )

>> ## fit
>> model.fit(X_train.reset_index(drop=True), y_train)

>> ## predict
>> pred = model.predict(X_test)
>> pred = np.where(pred<0, 0, pred)
>> eval_metrics = AdaSTEM.eval_STEM_res('hurdle',y_test, pred_mean)
>> print(eval_metrics)
Source code in stemflow/model/Hurdle.py 
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def __init__(self, classifier: BaseEstimator, regressor: BaseEstimator):
    """Make a Hurdle_for_AdaSTEM class object

    Normally speaking, AdaSTEMClassifier and AdaSTEMRegressor should be passed here if using this class.

    Args:
        classifier:
            A sklearn style classifier estimator (should be AdaSTEMClassifier here). Must have `fit` and `predict` methods.
            Will be better if it has `predict_proba` method, which returns a numpy array of shape (n_sample, 2)
        regressor:
            A sklearn style regressor estimator (should be AdaSTEMRegressor here). Must have `fit` and `predict` methods.

    Example:
        ```
        >> from stemflow.model.AdaSTEM import AdaSTEM, AdaSTEMClassifier, AdaSTEMRegressor
        >> from stemflow.model.Hurdle import Hurdle_for_AdaSTEM
        >> from xgboost import XGBClassifier, XGBRegressor

        >> SAVE_DIR = './'

        >> model = Hurdle_for_AdaSTEM(
        ...     classifier=AdaSTEMClassifier(base_model=XGBClassifier(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
        ...                                 save_gridding_plot = True,
        ...                                 ensemble_fold=10,
        ...                                 min_ensemble_required=7,
        ...                                 grid_len_lon_upper_threshold=25,
        ...                                 grid_len_lon_lower_threshold=5,
        ...                                 grid_len_lat_upper_threshold=25,
        ...                                 grid_len_lat_lower_threshold=5,
        ...                                 points_lower_threshold=50,
        ...                                 Spatio1='longitude',
        ...                                 Spatio2 = 'latitude',
        ...                                 Temporal1 = 'DOY',
        ...                                 use_temporal_to_train=True),
        ...     regressor=AdaSTEMRegressor(base_model=XGBRegressor(tree_method='hist',random_state=42, verbosity = 0, n_jobs=1),
        ...                                 save_gridding_plot = True,
        ...                                 ensemble_fold=10,
        ...                                 min_ensemble_required=7,
        ...                                 grid_len_lon_upper_threshold=25,
        ...                                 grid_len_lon_lower_threshold=5,
        ...                                 grid_len_lat_upper_threshold=25,
        ...                                 grid_len_lat_lower_threshold=5,
        ...                                 points_lower_threshold=50,
        ...                                 Spatio1='longitude',
        ...                                 Spatio2 = 'latitude',
        ...                                 Temporal1 = 'DOY',
        ...                                 use_temporal_to_train=True)
        ... )

        >> ## fit
        >> model.fit(X_train.reset_index(drop=True), y_train)

        >> ## predict
        >> pred = model.predict(X_test)
        >> pred = np.where(pred<0, 0, pred)
        >> eval_metrics = AdaSTEM.eval_STEM_res('hurdle',y_test, pred_mean)
        >> print(eval_metrics)


        ```

    """

    self.classifier = classifier
    self.regressor = regressor

fit(X_train, y_train, verbosity=1)

Fitting model Args: X_train: Training variables y_train: Training target verbosity: Whether to show progress bar. 0 for No, and Yes other wise.

Source code in stemflow/model/Hurdle.py 
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def fit(self, X_train: Union[pd.core.frame.DataFrame, np.ndarray], y_train: Sequence, verbosity: int = 1):
    """Fitting model
    Args:
        X_train:
            Training variables
        y_train:
            Training target
        verbosity:
            Whether to show progress bar. 0 for No, and Yes other wise.

    """
    binary_ = np.unique(np.where(y_train > 0, 1, 0))
    if len(binary_) == 1:
        warnings.warn("Warning: only one class presented. Replace with dummy classifier & regressor.")
        self.classifier = dummy_model1(binary_[0])
        self.regressor = dummy_model1(binary_[0])
        return

    X_train["y_train"] = y_train

    if verbosity == 0:
        self.classifier.fit(X_train.iloc[:, :-1], np.where(X_train.iloc[:, -1].values > 0, 1, 0), verbosity=0)
        self.regressor.fit(
            X_train[X_train["y_train"] > 0].iloc[:, :-1],
            np.array(X_train[X_train["y_train"] > 0].iloc[:, -1]),
            verbosity=0,
        )
    else:
        self.classifier.fit(X_train.iloc[:, :-1], np.where(X_train.iloc[:, -1].values > 0, 1, 0), verbosity=1)
        self.regressor.fit(
            X_train[X_train["y_train"] > 0].iloc[:, :-1],
            np.array(X_train[X_train["y_train"] > 0].iloc[:, -1]),
            verbosity=1,
        )

predict(X_test, njobs=1, verbosity=1, return_by_separate_ensembles=False)

Predict

Parameters:

  • X_test (Union[DataFrame, ndarray]) –

    Test variables

  • njobs (int, default: 1 ) –

    Multi-processing in prediction.

  • verbosity (int, default: 1 ) –

    Whether to show progress bar. 0 for No, and Yes other wise.

  • return_by_separate_ensembles (bool, default: False ) –

    Test function. return not by aggregation, but by separate ensembles.

Returns:

  • ndarray –

    A prediction array with shape (-1,1)

Source code in stemflow/model/Hurdle.py 
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def predict(
    self,
    X_test: Union[pd.core.frame.DataFrame, np.ndarray],
    njobs: int = 1,
    verbosity: int = 1,
    return_by_separate_ensembles: bool = False,
) -> np.ndarray:
    """Predict

    Args:
        X_test:
            Test variables
        njobs:
            Multi-processing in prediction.
        verbosity:
            Whether to show progress bar. 0 for No, and Yes other wise.
        return_by_separate_ensembles (bool, optional):
            Test function. return not by aggregation, but by separate ensembles.

    Returns:
        A prediction array with shape (-1,1)
    """
    if verbosity == 0:
        cls_res = self.classifier.predict(
            X_test, njobs=njobs, verbosity=0, return_by_separate_ensembles=return_by_separate_ensembles
        )
        reg_res = self.regressor.predict(
            X_test, njobs=njobs, verbosity=0, return_by_separate_ensembles=return_by_separate_ensembles
        )
    else:
        cls_res = self.classifier.predict(
            X_test, njobs=njobs, verbosity=1, return_by_separate_ensembles=return_by_separate_ensembles
        )
        reg_res = self.regressor.predict(
            X_test, njobs=njobs, verbosity=1, return_by_separate_ensembles=return_by_separate_ensembles
        )
    # reg_res = np.where(reg_res>=0, reg_res, 0) ### we constrain the reg value to be positive
    res = np.where(cls_res < 0.5, 0, cls_res)
    res = np.where(cls_res > 0.5, reg_res, cls_res)
    return res.reshape(-1, 1)

predict_proba(X_test, njobs=1, verbosity=0, return_by_separate_ensembles=False)

Just a rewrite of predict method

Parameters:

  • X_test (Union[DataFrame, ndarray]) –

    Testing variables

  • njobs (int, default: 1 ) –

    Multi-processing in prediction.

  • verbosity (int, default: 0 ) –

    Whether to show progress bar. 0 for No, and Yes other wise.

  • return_by_separate_ensembles (bool, default: False ) –

    Test function. return not by aggregation, but by separate ensembles.

Returns:

  • ndarray –

    A prediction array with shape (-1,1)

Source code in stemflow/model/Hurdle.py 
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def predict_proba(
    self,
    X_test: Union[pd.core.frame.DataFrame, np.ndarray],
    njobs: int = 1,
    verbosity: int = 0,
    return_by_separate_ensembles: bool = False,
) -> np.ndarray:
    """Just a rewrite of `predict` method

    Args:
        X_test:
            Testing variables
        njobs:
            Multi-processing in prediction.
        verbosity:
            Whether to show progress bar. 0 for No, and Yes other wise.
        return_by_separate_ensembles (bool, optional):
            Test function. return not by aggregation, but by separate ensembles.

    Returns:
        A prediction array with shape (-1,1)
    """

    return self.predict(
        self, X_test, njobs=njobs, verbosity=verbosity, return_by_separate_ensembles=return_by_separate_ensembles
    )