Displaying 2 results from an estimated 2 matches for "incoterm".
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cincoter
2008 Aug 05
1
Extracting variable names of final model in stepAIC
...for the purpose of variable
selection.
> lmModel <- lm(y~.,data.frame(y=y, x=x))
> step <- stepAIC(lmModel, direction="both")
> step$anova
Stepwise Model Path
Analysis of Deviance Table
Initial Model:
y ~ x.Market.Price + x.Quantity + x.Country + x.Incoterm + x.Channel +
x.PaymentTerm
Final Model:
y ~ x.Quantity + x.Country + x.Incoterm + x.PaymentTerm
Step Df Deviance Resid. Df Resid. Dev AIC
1 1067 852257.2 7268.945
2 - x.Channel 1 127.9724 1068 852385.2 7267...
2008 Jul 31
1
predict rpart: new data has new level
Hi. I uses rpart to build a regression tree. Y is continuous. Now, I try
to predict on a new set of data. In the new set of data, one of my x (call
Incoterm, a factor) has a new level.
I wonder why the error below appears as the guide says "For factor
predictors, if an observation contains a level not used to grow the tree, it
is left at the deepest possible node and frame$yval at the node is the
prediction. "
Many thanks....