[R] boost package help

From: maomao bao <feimaobaobao_at_hotmail.com>
Date: Mon, 02 Jun 2008 21:39:52 -0400


Hi,  

Is there anyone have some experience in the boost package. I used the logitboost function to do the two-class classification.  

This is the format I used.
logitboost(xtrain, ytrain, xtest, presel = 2, mfinal = 100) # with feature selection    

logitboost(xtrain, ytrain, xtest, presel = 0, mfinal = 100) # without feature selection  

xtrain is n*p, n is sample size, p is dimension  

The error is always like this  

Error in model.frame.default(formula = y ~ bx, weights = w/mean(w), na.action = function (x) : invalid type (list) for variable 'bx'    

I tried to implement by copying the original code of this function to track down but still I don't know what's the reason. Could somebody help me with that?
I greatly appreciate your help!  

sincerely,
Linda


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