[R] rpart 3.1 bug followup

[Marc R. Feldesman]

In rpart < 3.1, the rpart object has a component called parms, which was 
stored as a vector.  In rpart 3.1, the parms component is stored as a list, 
but xpred.rpart (3.1) is still expecting a vector.

 From 3.0.2:

  iris.rpart$parms
  [1] 0.3333333 0.3333333 0.3333333 0.0000000 1.0000000 1.0000000 1.0000000
  [8] 0.0000000 1.0000000 1.0000000 1.0000000 0.0000000 1.0000000

In 3.1.0

 > iris.rpart.310$parms
$prior
[1] 0.3333333 0.3333333 0.3333333

$loss
      [,1] [,2] [,3]
[1,]    0    1    1
[2,]    1    0    1
[3,]    1    1    0

$split
[1] 1

This structure is fairly obvious from reading the rpart help, but does not 
work with xpred.rpart as long as there is a non-default parms argument in 
the rpart object.





Dr. Marc R. Feldesman
email:  feldesmanm at pdx.edu
email:  feldesman at attglobal.net
fax:    503-725-3905

"Don't know where I'm going.
Don't like where I've been.
There may be no exit.
But hell, I'm going in."  Jimmy Buffett

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