Dear all,
I have trained a J48 classifier in RWeka but when I try to predict on new
data I get the following exceptions:
fit <- J48(...)
yNew <- predict(fit, x, type="probability");
Error in .jcall("RWekaInterfaces", "[D", "distributionForInstances",
.jcast(classifier, :
java.lang.NullPointerException
What could be the cause of this ?
I am using R version 2.10.0 on a Linux server.
Thanks,
Markus
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