[R] Why 'gbm' is not giving me error when I change the response from numeric to categorical?

peter dalgaard pdalgd at gmail.com
Fri Oct 4 21:35:03 CEST 2013

On Oct 4, 2013, at 21:16 , Mary Kindall wrote:

> Y[Y < mean(Y)] = 0   #My edit
> Y[Y >= mean(Y)] = 1  #My edit

I have no clue about gbm, but I don't think the above does what I think you think it does. 

Y <- as.integer(Y >= mean(Y)) 

might be closer to the mark.

Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

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