TOPICS (Click to Navigate)
Wednesday, 20 November 2019
Simple introduction to Naive Bayes classifier
A Naive Bayes classifier is a probabilistic classifier that uses Bayes' theorem with an independence assumption between the features that are used for classification.
It uses Bayes' theorem.
Here, A is the target class, B is the predictor attribute. P(A|B) is the probability of A given B, i.e. probability of a class given the predictor attribute. Writing this way is called as conditional probability.
What is it used for?
It is used for classification task in machine learning.
A Naive Bayes classifier assumes that the presence of a particular feature in a class is unrelated to the presence of any other feature. For example, to decide playing a game of cricket, the temperature, humidity and wind may be the features. And, temperature may be Hot or Cold, humidity may be High or Low and it may be windy or not. But, these features are not dependent on each other. that means, the Hot temperature is nothing to do with the Low humidity. in simpler terms, each feature is independent and each feature is given equal weight in classification task.
Here is a video lecture from Louis Serrano on Naive Bayes Classifier;
Go to the NLP and Data Science online lectures page
Evaluation of language model using Perplexity , How to apply the metric Perplexity? Perplexity is a measurement of how well a probabilit...
Advanced concepts in DBMS Advanced Database Topics (Click on the links to navigate) Advanced Concepts in D...
Query Processing in DBMS / Steps involved in Query Processing in DBMS / How is a query gets processed in a Database Management System? / Q...
Set of solved exercises in Normalization / Normalization Solved Examples / How to find candidate keys, and primary keys in database? /...