• using R version 2.8.0 beta (2008-10-08 r46670)
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  • this is package 'boost' version '1.0-0'
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  • checking R code for possible problems ... NOTE
    adaboost: no visible binding for global variable 'method'
    bagboost: no visible binding for global variable 'method'
    l2boost: no visible binding for global variable 'method'
    learner: no visible global function definition for 'rpart.control'
    learner: no visible global function definition for 'rpart'
    logitboost: no visible binding for global variable 'method'
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  • creating boost-Ex.R ... OK
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  • checking examples ... ERROR
    Running examples in 'boost-Ex.R' failed.
    The error most likely occurred in:

    > ### * adaboost
    >
    > flush(stderr()); flush(stdout())
    >
    > ### Name: adaboost
    > ### Title: adaboost
    > ### Aliases: adaboost
    > ### Keywords: classif
    >
    > ### ** Examples
    >
    > data(leukemia, package = "boost")
    >
    > ## Dividing the leukemia dataset into training and test data
    > xlearn <- leukemia.x[c(1:20, 34:38),]
    > ylearn <- leukemia.y[c(1:20, 34:38)]
    > xtest <- leukemia.x[21:33,]
    > ytest <- leukemia.y[21:33]
    >
    > ## Classification with adaboost
    > fit <- adaboost(xlearn, ylearn, xtest, presel=50, mfinal=20)
    Error in learner(ylearn, w, xlearn, xtest, method, args, bag = 1) :
    could not find function "rpart.control"
    Calls: adaboost -> learner
    Execution halted