baseline_classifier¶
Module Contents¶
Classes Summary¶
Classifier that predicts using the specified strategy. |
Contents¶
-
class
evalml.pipelines.components.estimators.classifiers.baseline_classifier.BaselineClassifier(strategy='mode', random_seed=0, **kwargs)[source]¶ Classifier that predicts using the specified strategy.
This is useful as a simple baseline classifier to compare with other classifiers.
- Parameters
strategy (str) – Method used to predict. Valid options are “mode”, “random” and “random_weighted”. Defaults to “mode”.
random_seed (int) – Seed for the random number generator. Defaults to 0.
Attributes
hyperparameter_ranges
{}
model_family
ModelFamily.BASELINE
modifies_features
True
modifies_target
False
name
Baseline Classifier
predict_uses_y
False
supported_problem_types
[ProblemTypes.BINARY, ProblemTypes.MULTICLASS]
Methods
Returns class labels. Will return None before fitting.
Constructs a new component with the same parameters and random state.
Returns the default parameters for this component.
Describe a component and its parameters
Returns importance associated with each feature. Since baseline classifiers do not use input features to calculate predictions, returns an array of zeroes.
Fits component to data
Loads component at file path
Returns boolean determining if component needs fitting before
Returns the parameters which were used to initialize the component
Make predictions using selected features.
Make probability estimates for labels.
Saves component at file path
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property
classes_(self)¶ Returns class labels. Will return None before fitting.
- Returns
Class names
- Return type
list[str] or list(float)
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clone(self)¶ Constructs a new component with the same parameters and random state.
- Returns
A new instance of this component with identical parameters and random state.
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default_parameters(cls)¶ Returns the default parameters for this component.
Our convention is that Component.default_parameters == Component().parameters.
- Returns
default parameters for this component.
- Return type
dict
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describe(self, print_name=False, return_dict=False)¶ Describe a component and its parameters
- Parameters
print_name (bool, optional) – whether to print name of component
return_dict (bool, optional) – whether to return description as dictionary in the format {“name”: name, “parameters”: parameters}
- Returns
prints and returns dictionary
- Return type
None or dict
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property
feature_importance(self)¶ Returns importance associated with each feature. Since baseline classifiers do not use input features to calculate predictions, returns an array of zeroes.
- Returns
An array of zeroes
- Return type
np.ndarray (float)
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fit(self, X, y=None)[source]¶ Fits component to data
- Parameters
X (list, pd.DataFrame or np.ndarray) – The input training data of shape [n_samples, n_features]
y (list, pd.Series, np.ndarray, optional) – The target training data of length [n_samples]
- Returns
self
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static
load(file_path)¶ Loads component at file path
- Parameters
file_path (str) – Location to load file
- Returns
ComponentBase object
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needs_fitting(self)¶ Returns boolean determining if component needs fitting before calling predict, predict_proba, transform, or feature_importances. This can be overridden to False for components that do not need to be fit or whose fit methods do nothing.
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property
parameters(self)¶ Returns the parameters which were used to initialize the component
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predict(self, X)[source]¶ Make predictions using selected features.
- Parameters
X (pd.DataFrame, np.ndarray) – Data of shape [n_samples, n_features]
- Returns
Predicted values
- Return type
pd.Series
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predict_proba(self, X)[source]¶ Make probability estimates for labels.
- Parameters
X (pd.DataFrame, or np.ndarray) – Features
- Returns
Probability estimates
- Return type
pd.Series
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save(self, file_path, pickle_protocol=cloudpickle.DEFAULT_PROTOCOL)¶ Saves component at file path
- Parameters
file_path (str) – Location to save file
pickle_protocol (int) – The pickle data stream format.
- Returns
None