Thank you Dennis, I've got the idea now.
However, a followup question to make sure I'm not wasting my time.
If I specify the precise CV folds to use, should I not get the same
tree every time?
e.g. here I have an hypothetical time sequence observed with error
from 3 sites 's'
If I specify to l
Dear R's
I'm trying to use specific rather than random cross-validation groups
in mvpart.
The man page says:
xval Number of cross-validations or vector defining cross-validation groups.
And I found this reply to the list by Terry Therneau from 2006
The rpart function allows one to give the cro
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