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Naive Bayes Classification Algorithm

Posted on December 10, 2021December 10, 2021 By christo No Comments on Naive Bayes Classification Algorithm

The Bayesian Classification represents a supervised learning method as well as a statistical method for classification. Assumes an underlying probabilistic model and it allows us to capture uncertainty about the model in a principled way by determining probabilities of the outcomes. It can solve diagnostic and predictive problems

This Classification is named after Thomas Bayes ( 1702-1761), who proposed the Bayes Theorem

Bayesian classification provides practical learning algorithms and prior knowledge and observed data can be combined. Bayesian Classification provides a useful perspective for understanding and evaluating many learning algorithms. It calculates explicit probabilities for hypothesis and it is robust to noise in input data

Uses of Naive Bayes classification:

  • The Bayesian classification is used as a probabilistic learning method (Naive Bayes text classification). Naive Bayes classifiers are among the most successful known algorithms for learning to classify text documents.
  • Spam filtering is the best known use of Naive Bayesian text classification. It makes use of a naive Bayes classifier to identify spam e-mail. Bayesian spam filtering has become a popular mechanism to distinguish illegitimate spam email from legitimate email (sometimes called “ham” or “bacn”).[4] Many modern mail clients implement Bayesian spam filtering. Users can also install separate email filtering programs. Server-side email filters, such as DSPAM, SpamAssassin, SpamBayes, Bogofilter and ASSP, make use of Bayesian spam filtering techniques, and the functionality is sometimes embedded within mail server software itself
  • Recommender Systems apply machine learning and data mining techniques for filtering unseen information and can predict whether a user would like a given resource. It is proposed a unique switching hybrid recommendation approach by combining a Naive Bayes classification approach with the collaborative filtering. Experimental results on two different data sets, show that the proposed algorithm is scalable and provide better performance–in terms of accuracy and coverage–than other algorithms while at the same time eliminates some recorded problems with the recommender systems.

Example of Naive Bayes Classification

Bayes Theorem

Bayesian reasoning is applied to decision making and inferential statistics that deals with probability inference. It is used the knowledge of prior events to predict future events.

Example: Predicting the color of marbles in a basket

Bayes Theorem
Bayes Theorem Example

Theory of Bayes Theorem

Bayes
  • P(h) : Prior probability of hypothesis h
  • P(D) : Prior probability of training data D
  • P(h/D) : Probability of h given D
  • P(D/h) : Probability of D given h

Artificial intelligence Tags:Naive Bayes, Naive Bayes Classification Algorithm

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