Why is my resubLoss so high?

2 次查看（过去 30 天）

Tania 2014-7-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141099-why-is-my-resubloss-so-high

评论： Tania 2014-7-10

Hi, I have used the function rtree =RegressionTree.fit(X,Y), afterwards I have used the function resubLoss(rtree). I got a really resubLoss (or MSE). I have read that sometimes it is better to use th RMSE in order to have the result in the same dimension as the data. Might this be the problem? How would I change resubLoss in order to calculate the root of it?

Thank you :)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Shashank Prasanna 2014-7-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141099-why-is-my-resubloss-so-high#answer_144326

在 MATLAB Online 中打开

Maybe a single regression tree is not sufficient to model your data. You may want to try using an ensemble of bagged trees.

http://www.mathworks.com/help/stats/treebagger.html

To answer your original question, you can simply take the square root of the output

sqrt(resubLoss(tree))

Alternatively, you can specify your own loss function:

http://www.mathworks.com/help/stats/regressiontree.resubloss.html#bswj563-3

3 个评论
显示 1更早的评论隐藏 1更早的评论

Shashank Prasanna 2014-7-9

Tania, you have several good questions. Have you tried contacting technical support? You will be able to get all of these addressed on the phone or by a quick email:

http://www.mathworks.com/support/contact_us/

Tania 2014-7-10

Thanks, I have done it now (but did it before and it took really long to get an answer). If you have any idea for any of the above questions i would really appreciate it. Thank you!:))

请先登录，再进行评论。