Overview¶

Generative topographic mapping (GTM) is a probabilisitc dimensionality reduction algorithm introduced by Bishop, Svensen and Williams, which can also be used for classification and regression using class maps or activity landscapes:

ugtm v2.0 provides sklearn-compatible GTM transformer (eGTM), GTM classifier (eGTC) and GTM regressor (eGTR):

from ugtm import eGTM, eGTC, eGTR
import numpy as np

# Dummy train and test
X_train = np.random.randn(100, 50)
X_test = np.random.randn(50, 50)
y_train = np.random.choice([1, 2, 3], size=100)

# GTM transformer
transformed = eGTM().fit(X_train).transform(X_test)

# Predict new labels using GTM classifier (GTC)
predicted_labels = eGTC().fit(X_train, y_train).predict(X_test)

# Predict new continuous outcomes using GTM regressor (GTR)
predicted_labels = eGTR().fit(X_train, y_train).predict(X_test)