linear-tree
A python library to build Model Trees with Linear Models at the leaves.
Overview
Linear Model Trees combine the learning ability of Decision Tree with the predictive and explicative power of Linear Models. Like in tree-based algorithms, the data are split according to simple decision rules. The goodness of slits is evaluated in gain terms fitting Linear Models in the nodes. This implies that the models in the leaves are linear instead of constant approximations like in classical Decision Trees.
linear-tree is developed to be fully integrable with scikit-learn. LinearTreeRegressor and LinearTreeClassifier are provided as scikit-learn BaseEstimator. They are wrappers that build a decision tree on the data fitting a linear estimator from sklearn.linear_model. All the models available in sklearn.linear_model can be used as linear estimators.
Installation
pip install linear-tree
The module depends on NumPy, SciPy and Scikit-Learn (>=0.23.0). Python 3.6 or above is supported.
Media
- Linear Tree: the perfect mix of Linear Model and Decision Tree
- Model Tree: handle Data Shifts mixing Linear Model and Decision Tree
- Explainable AI with Linear Trees
Usage
Regression
from sklearn.linear_model import LinearRegression
from lineartree import LinearTreeRegressor
from sklearn.datasets import make_regression
X, y = make_regression(n_samples=100, n_features=4,
n_informative=2, n_targets=1,
random_state=0, shuffle=False)
regr = LinearTreeRegressor(base_estimator=LinearRegression())
regr.fit(X, y)
Classification
from sklearn.linear_model import RidgeClassifier
from lineartree import LinearTreeClassifier
from sklearn.datasets import make_classification
X, y = make_classification(n_samples=100, n_features=4,
n_informative=2, n_redundant=0,
random_state=0, shuffle=False)
clf = LinearTreeClassifier(base_estimator=RidgeClassifier())
clf.fit(X, y)
More examples in the notebooks folder.
Check the API Reference to see the parameter configurations and the available methods.
Examples
Show the model tree structure:
Linear Tree Regressor at work:
Linear Tree Classifier at work:
Extract and examine coefficients at the leaves:
7 Nov 01, 2022
890 Jan 04, 2023
136 Dec 18, 2022
35 Oct 29, 2022
257 Jan 02, 2023
589 Jan 04, 2023
0 Dec 18, 2021
147 Dec 14, 2022
32 Dec 24, 2022
7 Jul 25, 2022
14 Nov 29, 2022
3.3k Jan 06, 2023
38 Dec 05, 2022
129 Dec 13, 2022
2 Dec 23, 2021
41 Dec 14, 2022
6 May 05, 2022
0 Jan 05, 2022
37 Dec 15, 2022
20 Jun 16, 2021