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2010 Oct 19
0
RWeka - Error in model.frame.default - evaluate_Weka_classifier
...t;- 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.
evaluate_Weka_classifier(t, testSet)
This is when I get
Error in model.frame.default(formula = trainingSet$Species ~ ., data = list( :
variable lengths differ (found for 'Sepal.Length')
traceback() returns:
7: model.frame.default(formula = trainingSet$Species ~ ., data = list(
[...]
3L, 3L, 3L, 3L,...