weka - R: Write arff with missing values -


i'm constructing data frame on r , want export arff format. so, using write.arff() function rweka library. however, when dealing missing values (?), output like:

@attribute atomic_comp_c {'?',3014,3212,3226,3234,3236,3238,3}

instead of:

@attribute atomic_comp_c numeric

does know how can export data frame arff format correctly?

thanks in advance


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