Sage-Tips

Is classification same as logistic regression?

Logistic regression is emphatically not a classification algorithm on its own. It is only a classification algorithm in combination with a decision rule that makes dichotomous the predicted probabilities of the outcome. The problem is actually risk estimation, not classification.

What is the difference between GLM and regression?

The term general linear model (GLM) usually refers to conventional linear regression models for a continuous response variable given continuous and/or categorical predictors. It includes multiple linear regression, as well as ANOVA and ANCOVA (with fixed effects only).

Is logistic regression a classification model?

Logistic Regression is a classification technique used in machine learning. It uses a logistic function to model the dependent variable.

Is logistic regression A regression model or a classification model?

Logistic regression is basically a supervised classification algorithm. In a classification problem, the target variable(or output), y, can take only discrete values for a given set of features(or inputs), X. Contrary to popular belief, logistic regression IS a regression model.

Why logistic regression is considered as a classification algorithm?

Logistic regression is a classification algorithm, used when the value of the target variable is categorical in nature. Logistic regression is most commonly used when the data in question has binary output, so when it belongs to one class or another, or is either a 0 or 1.

Is logistic regression used for classification?

Logistic regression is a simple yet very effective classification algorithm so it is commonly used for many binary classification tasks. The basis of logistic regression is the logistic function, also called the sigmoid function, which takes in any real valued number and maps it to a value between 0 and 1.

Why is logistic regression considered a generalized linear model?

The short answer is: Logistic regression is considered a generalized linear model because the outcome always depends on the sum of the inputs and parameters. Or in other words, the output cannot depend on the product (or quotient, etc.) of its parameters! So, why is that?

What are the different types of regression models?

Of the regression models, the most popular two are linear and logistic models. A basic linear model follows the famous equation y=mx+b , but is typically formatted slightly different to:

Can I run a linear regression on a higher order model?

You can still run a Linear Regression on a higher order model. A common misunderstanding is that only linear functions can be created with linear regression methods.

Should I use regression or logistic regression for binary labels?

Or, if the target is the probability of an observation being a binary label (ex. probability of being good instead of bad), then you should also choose a regression model, but the models you use will be slightly different.