How does predict with ensemble regression works?

2014 8 13
1 个回答
回答已采纳
更新时间：2015 2 10
3 次查看（30 天）

0 个投票

This might be a silly question...iam using bagging with regression trees. I built for instance 10 different trees, then I average them. when I then use predict to predict my y value, how does it work? does it somehow average the fitted y values?!
thanks for your help!!

请先登录，再回答此问题。

 采纳的回答

Shashank Prasanna
Shashank Prasanna 2014-8-13
编辑：Shashank Prasanna 2014-8-13

1 个投票

For classification the output of the ensemble is the class that gets majority vote from all the learners. For regression the results are averaged.
http://www.mathworks.com/help/stats/ensemble-methods.html#bsw8at7
http://en.wikipedia.org/wiki/Bootstrap_aggregating

2 个评论
显示 无 隐藏 无

Tania
Tania 2014-8-14
So for instance, if i have 10 observations and I built 5 different trees. i take all their predicted y values of the different trees and average them,yes?
Machine Learning
Machine Learning 2015-2-10
Short answer is yes.
However if you want a more accurate y you have to look into boosting.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Classification Ensembles 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by