# [R] RPart help

dstierman dstierman at micron.com
Wed May 1 17:48:26 CEST 2002

```I am using the rpart package and would like to know if there is a way to set
a minimum limit on how many rows there can be in a single factor to be
considered. I am getting results back on columns that have several factors,
but each factor will only have 2 or 3 rows. So it meets the minbucket and
minsplit criteria when they get grouped together. See below for an example
(leaf 6 has 12 rows, 6 factors so each one has an average of 2 actual data
points). I would like to set the cutoff above 2 to avoid this.
Thanks, Don

n=57 (200 observations deleted due to missing)

node), split, n, deviance, yval
* denotes terminal node

1) root 57 122.910600 1.5271950
2) X.1.A=A53 ,A59 ,A61 ,A63 ,A64  31  50.516670 0.9799769
4) X.2.A=A53 ,A58 ,A59 ,A60 ,A64 ,A72  16   5.221407 0.1872424 *
5) X.2.A=A56 ,A57 ,A61 ,A62 ,A63  15  24.515240 1.8255600 *
3) X.1.A=A56 ,A57 ,A58 ,A60 ,A62 ,A72  26  52.043030 2.1796470
6) X.S..A=A54 ,A57 ,A58 ,A59 ,A61 ,A62  12   9.819111 0.9266623 *
7) X.S..A=A53 ,A56 ,A60 ,A63 ,A64  14   7.236000 3.2536340 *
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