Random Forests
Leo Breiman
- Vol. 45, Iss: 1, pp 5-32
TLDR
Internal estimates monitor error, strength, and correlation and these are used to show the response to increasing the number of features used in the forest, and are also applicable to regression.Abstract:
Random forests are a combination of tree predictors such that each tree depends on the values of a random vector sampled independently and with the same distribution for all trees in the forest. The generalization error for forests converges a.s. to a limit as the number of trees in the forest becomes large. The generalization error of a forest of tree classifiers depends on the strength of the individual trees in the forest and the correlation between them. Using a random selection of features to split each node yields error rates that compare favorably to Adaboost (Y. Freund & R. Schapire, Machine Learning: Proceedings of the Thirteenth International conference, aaa, 148–156), but are more robust with respect to noise. Internal estimates monitor error, strength, and correlation and these are used to show the response to increasing the number of features used in the splitting. Internal estimates are also used to measure variable importance. These ideas are also applicable to regression.read more
Citations
More filters
Proceedings Article
Efficient and Robust Feature Extraction by Maximum Margin Criterion
Haifeng Li,Tao Jiang,Keshu Zhang +2 more
TL;DR: In this paper, a new feature extractor based on maximum margin criterion (MMC) was proposed, which does not depend on the nonsingularity of the within-class scatter matrix.
Journal ArticleDOI
Big Data applications in real-time traffic operation and safety monitoring and improvement on urban expressways
Qi Shi,Mohamed Abdel-Aty +1 more
TL;DR: The viability of a proactive real-time traffic monitoring strategy evaluating operation and safety simultaneously was explored and it was found that congestion on urban expressways was highly localized and time-specific.
Journal ArticleDOI
A novel ensemble method for classifying imbalanced data
TL;DR: A novel ensemble method is proposed, which firstly converts an imbalanced data set into multiple balanced ones and then builds a number of classifiers on these multiple data with a specific classification algorithm, which usually performs better than the conventional methods on im balanced data.
Journal ArticleDOI
Fingerprinting food: current technologies for the detection of food adulteration and contamination
David I. Ellis,Victoria L. Brewster,Warwick B. Dunn,J. William Allwood,Alexander P. Golovanov,Royston Goodacre +5 more
TL;DR: This introductory overview of food adulteration and contamination practices is hoped that it acts as a springboard for researchers in science, technology, engineering, and industry, in this era of systems-level thinking and interdisciplinary approaches to new and contemporary problems.
Posted Content
An introduction to Topological Data Analysis: fundamental and practical aspects for data scientists
Frédéric Chazal,Bertrand Michel +1 more
TL;DR: This paper is a brief introduction, through a few selected topics, to basic fundamental and practical aspects of TDA for non experts.
References
More filters
Journal ArticleDOI
Bagging predictors
TL;DR: Tests on real and simulated data sets using classification and regression trees and subset selection in linear regression show that bagging can give substantial gains in accuracy.
Proceedings Article
Experiments with a new boosting algorithm
Yoav Freund,Robert E. Schapire +1 more
TL;DR: This paper describes experiments carried out to assess how well AdaBoost with and without pseudo-loss, performs on real learning problems and compared boosting to Breiman's "bagging" method when used to aggregate various classifiers.
Journal ArticleDOI
The random subspace method for constructing decision forests
TL;DR: A method to construct a decision tree based classifier is proposed that maintains highest accuracy on training data and improves on generalization accuracy as it grows in complexity.
Journal ArticleDOI
An Experimental Comparison of Three Methods for Constructing Ensembles of Decision Trees: Bagging, Boosting, and Randomization
TL;DR: In this article, the authors compared the effectiveness of randomization, bagging, and boosting for improving the performance of the decision-tree algorithm C4.5 and found that in situations with little or no classification noise, randomization is competitive with bagging but not as accurate as boosting.
Journal ArticleDOI
An Empirical Comparison of Voting Classification Algorithms: Bagging, Boosting, and Variants
Eric Bauer,Ron Kohavi +1 more
TL;DR: It is found that Bagging improves when probabilistic estimates in conjunction with no-pruning are used, as well as when the data was backfit, and that Arc-x4 behaves differently than AdaBoost if reweighting is used instead of resampling, indicating a fundamental difference.