Classification regression tree structure

2014 8 13
1 个回答
更新时间：2014 8 20
1 次查看（30 天）

0 个投票

Has anyone used
clasregtree
function to build a tree with numerical responses (Y)? If yes then any idea how the means (Y bar) at each leaf (terminal nodes) is calculated?
Thanks

请先登录，再回答此问题。

回答（1 个）

the cyclist
the cyclist 2014-8-13

0 个投票

Have you tried reading the documentation?
doc classregtree
or looking at the code?
edit classregtree

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Sincloe Brans
Sincloe Brans 2014-8-13
Yes kind of did, I am not good in reading the code, hence asking for experts advise. I looked for keyword 'avg' or 'mean' which didn't show up! Eventually I need to find the observations over which each ybar is calculated at the leaf.
the cyclist
the cyclist 2014-8-13
I don't know the function well. Are the means a standard output of the function? If so, then you should be able to trace the name of the output variable backward through the function, to see how it is calculated.
Sincloe Brans
Sincloe Brans 2014-8-19
Attached is the function, actually classregtree is a class which I have no idea how to edit or get the intermediate results. If you look at line 746, ybar is calculated. Any idea on how to obtain that?
the cyclist
the cyclist 2014-8-20
编辑：the cyclist 2014-8-20
I suggest you take a look at this page about debugging MATLAB.
Where you first call classregtree, you should be able to set a breakpoint, and then step through the function line-by-line to see the values all variables during the calculation.

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Analysis of Variance and Covariance 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by