Hello,

   I want to wrote a R function which build an oblique decision tree. The
returned tree mix node providing from spliting variables as CART does, with
spatial line split. I'm a beginner in R but I have seen that the rpart
package provide a "method = usersplits". I think that I can't use it because
my spliting criteria need 2 variables (it's for spatial partitionning, so I
need space coordinate (x,y). I have already wrote a C function which return
the best spliting line.
   My questions are :
- Am I wrong while thinking I can't use rpart with usersplits?
- If I'm not, can I use rpart object for drawing my tree (I mean how can I
organize my results as an rpart object and use methods for rpart objects)?

Guillaume BARBET

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