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test_indices
2010 Oct 19
0
RWeka - Error in model.frame.default - evaluate_Weka_classifier
...se the RWeka interface for C4.5 (J48) classification.
As a proof of concept I'm using the Iris data set to create a training
set of 30 instances (10 per species) and use the remaining 120
instances as my test set.
This is what I do:
trainingIndices <- rep(1:10, 3) + rep(0:2, each=10) * 50
testIndices <- c(1:150)[-(trainingIndices)]
testSet <- iris[testIndices,]
trainingSet <- iris[trainingIndices,]
t <- J48(trainingSet ~ ., data=trainingSet)
So far, so good. I can even do predict(t, testSet). Now I want to get
more detailed statistics about the performance of my classifier.
evalua...