shu zhang
2008-Feb-29 21:48 UTC
[R] controlling for number of elements in each node of the tree in mvpart
Still about the mvpart. Is there any way I can control for the number of elements in each node in the function mvpart? Specifically, how can I ask partition to ignore node with elements less than 10? Thanks! -Shu
Gavin Simpson
2008-Feb-29 22:21 UTC
[R] controlling for number of elements in each node of the tree in mvpart
On Fri, 2008-02-29 at 16:48 -0500, shu zhang wrote:> Still about the mvpart. > Is there any way I can control for the number of elements in each node > in the function mvpart? Specifically, how can I ask partition to > ignore node with elements less than 10?mvpart is just a wrapper to (a modified version of) rpart so you control these aspects of the fit in the same way as univariate trees. In this case, look at ?rpart.control and argument minsplit. It won't ignore those nodes, but it won't split a node with fewer than minsplit observations in it. HTH G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%