AdaBoost

AdaBoost: The meta machine learning algorithm formulated by Yoav Freund and Robert Schapire

Description

AdaBoost, Adaptive Boosting, is a well-known meta machine learning algorithm that was proposed by Yoav Freund and Robert Schapire. In this project there two main files
1. ADABOOST_tr.m
2. ADABOOST_te.m
to traing and test a user-coded learning (classification) algorithm with AdaBoost. A demo file (demo.m) is provided that demonstrates how these two files can be used with a classifier (basic threshold classifier) for two class classification problem.

• MATLAB release: MATLAB 7.0.1 (R14SP1)

[Amit Ganatra]

good

[Dimitri Shvorob]

The formula does not look familiar; the reference, which you have to look for, does not either. Existence of several versions of the algorithm seems to be lost on the author. I would recommend Googling a well-documented 'Adaboost toolbox' by a guy from Moscow State University.

[Vimal Vaghela]

Still the Algorithm is not up to the mark. its really old one. too much imrproved versions are there.

[Ghahramani Mohammad]

I recommend the one from Russia, but than one has error too. it works for the data with Dimension smaller than Number of samples the code must be changed from length to size because in some cases such as face recognition D is larger than N.

[Naiwala]

I think you mean GML Adaboost (>one from Russia) right?
Actully, I was trying to use it for couple of days without any success.
  I see ... this is the case... the number of samples I use are less than the number of dimensions.
Could you let us know If you have any idea to update the code to deal with this case.
Thanks!

[NUAA Þ]

Is there anybody working on the Adaboost R2 for regeression?

[Sidath Liyanage]

Does anyone have a code for Adaboost M2 for multiclass classification with weaklearners performing less than 50%?

[mila amel]

I couldn't see how these two files can be used adaboost_te.m and adaboost_tr.m?

[Jingzhou]

I will learn it.

[Mohammad Ali Bagheri]

Actually I wanna know how it work with multi-class problems?

[l2005_lijian]

ok

[Xinzhu Wang]

 

[cheekycheetah adaboost]

weaklearners performing less than 50% is not an issue actually. Problem comes when there are performing exactly or near to 50% : it is like forming a good commitee with rolling dices then

[Behrouz]

I am using your toolbox for boosting SVM as the weak classifier. But I found out that the class likelihoods are needed for your method, but all I have for SVM output are the predicted labels, is there any way to solve this?