Gaussian Naive Bayes#
Gaussian Naive Bayes is a version of the Naive Bayes classifier for continuous features. It places a probability density function over the input features on a class basis and uses Bayes' Theorem to derive the class probabilities. In addition to feature independence, Gaussian NB comes with the additional assumption that all features are normally (Gaussian) distributed.
Data Type Compatibility: Continuous
|1||priors||null||array||The class prior probabilities as an associative array with class labels as keys and the prior probabilities as values. If null, then the learner will compute these values from the training set.|
Return the class prior probabilities:
public priors() : ?array
Return the running mean of each feature column for each class:
public means() : ?array
Return the running variance of each feature column for each class:
public variances() : ?array
use Rubix\ML\Classifiers\GaussianNB; $estimator = new GaussianNB([ 'benign' => 0.9, 'malignant' => 0.1, ]);
- T. F. Chan et al. (1979). Updating Formulae and a Pairwise Algorithm for Computing Sample Variances.