ALMAClassifier¶
Approximate Large Margin Algorithm (ALMA).
Parameters¶
-
p – defaults to
2 -
alpha – defaults to
0.9 -
B – defaults to
1.1111111111111112 -
C – defaults to
1.4142135623730951
Attributes¶
-
w (collections.defaultdict)
The current weights.
-
k (int)
The number of instances seen during training.
Examples¶
>>> from river import datasets
>>> from river import evaluate
>>> from river import linear_model
>>> from river import metrics
>>> from river import preprocessing
>>> dataset = datasets.Phishing()
>>> model = (
... preprocessing.StandardScaler() |
... linear_model.ALMAClassifier()
... )
>>> metric = metrics.Accuracy()
>>> evaluate.progressive_val_score(dataset, model, metric)
Accuracy: 82.64%
Methods¶
clone
Return a fresh estimator with the same parameters.
The clone has the same parameters but has not been updated with any data. This works by looking at the parameters from the class signature. Each parameter is either - recursively cloned if it's a River classes. - deep-copied via copy.deepcopy if not. If the calling object is stochastic (i.e. it accepts a seed parameter) and has not been seeded, then the clone will not be idempotent. Indeed, this method's purpose if simply to return a new instance with the same input parameters.
learn_one
Update the model with a set of features x and a label y.
Parameters
- x (dict)
- y (Union[bool, str, int])
Returns
Classifier: self
predict_many
Predict the labels of a DataFrame X.
Parameters
- X (pandas.core.frame.DataFrame)
Returns
Series: Series of predicted labels.
predict_one
Predict the label of a set of features x.
Parameters
- x (dict)
Returns
typing.Union[bool, str, int]: The predicted label.
predict_proba_many
Predict the labels of a DataFrame X.
Parameters
- X (pandas.core.frame.DataFrame)
Returns
DataFrame: DataFrame that associate probabilities which each label as columns.
predict_proba_one
Predict the probability of each label for a dictionary of features x.
Parameters
- x (dict)
Returns
typing.Dict[typing.Union[bool, str, int], float]: A dictionary that associates a probability which each label.