手法を比較

	正則化ロジスティック回帰	Elastic Net
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	1996–2005	2005
提唱者	Tibshirani, R. (lasso); Hoerl & Kennard (ridge); Zou & Hastie (elastic net)	Zou, H. & Hastie, T.
種類	Penalized classification model	Regularized linear regression (L1 + L2 penalty)
原典	Tibshirani, R. (1996). Regression shrinkage and selection via the lasso. Journal of the Royal Statistical Society: Series B, 58(1), 267–288.	Zou, H. & Hastie, T. (2005). Regularization and Variable Selection via the Elastic Net. Journal of the Royal Statistical Society: Series B, 67(2), 301–320.
別名	penalized logistic regression, L1 logistic regression, L2 logistic regression, elastic net logistic regression	Elastic Net Regresyon, elastic net regression, ElasticNet, L1/L2 regularized regression
関連	5	4
概要	Regularized logistic regression extends standard logistic regression by adding an L1 (lasso), L2 (ridge), or elastic net penalty to the log-likelihood, shrinking coefficients toward zero and preventing overfitting. It is the default choice for binary or multinomial classification when you want interpretable, sparse, or stable coefficient estimates in high-dimensional or collinear feature spaces.	Elastic Net is a regularized linear regression method introduced by Zou and Hastie in 2005 that blends the LASSO (L1) and Ridge (L2) penalties, so it performs variable selection and coefficient shrinkage at the same time. It is designed for predictive and explanatory modelling on data with many, possibly correlated, predictors.