Regression (Linear Regression, Logistic Regression)
Regression is a fundamental concept in statistics and artificial intelligence that involves predicting a continuous or numerical output based on input features. It encompasses a range of techniques and models used to establish relationships between variables and make quantitative predictions. Linear regression and logistic regression are two prominent forms of regression widely used in AI applications.
Linear regression aims to model the relationship between input features and a continuous target variable by fitting a linear equation. The goal is to find the best-fitting line that minimizes the difference between the predicted values and the actual target values. Linear regression is often used for tasks like predicting housing prices based on features like square footage, number of bedrooms, and location.
Logistic regression, despite its name, is used for binary classification problems. It estimates the probability that a given input belongs to a particular class. Logistic regression models the relationship between input features and the log odds of the target variable being in a specific class. It uses the logistic function to map the linear combination of features to a probability score between 0 and 1, making it suitable for tasks like spam detection or medical diagnosis.
Both linear and logistic regression are foundational techniques in AI and serve as building blocks for more complex models. They provide interpretable insights into the relationships between variables and offer a solid foundation for predictive modeling and decision-making in various domains.« Back to Glossary Index