Hi all,
Last post didn't give the plain format:
I was trying to combine RWeka and FSelector, and do the forward feature
selection with J48/C5.4 decision tree:
Here is the code:
#==================
library(RWeka)
library(FSelector)
library(rpart)
data(iris)
evaluator <- function(subset) {
p <- J48(as.simple.formula(subset, "Species"), data=iris)
e <- evaluate_Weka_classifier(p)
print(subset)
print(e$details[1])
return(e$details[1])
}
subset <- forward.search(names(iris)[-5], evaluator)
=========================
I got this error, when I ran it:
Error in paste(attributes, sep = "", collapse = " + ") :
cannot coerce type 'closure' to vector of type 'character'
I don't know how I could fix this problem.
Thanks.
Yanwei
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