On 04.05.2012 13:54, kiinalist wrote:
Hi,
I tried to use naivebayes in package 'e1071'.
when I use following parameter, only one predictor, there is an error.
m<- naiveBayes(iris[,1], iris[,5])
table(predict(m, iris[,1]), iris[,5])
Error in log(sapply(attribs, function(v) { :
Non-numeric argument to mathematical function
Either use the more convninient formula notation:
m <- naiveBayes(Species ~ Sepal.Length, data = iris)
table(predict(m, iris), iris$Species)
or provide data.frames rather than vectors, hence:
m <- naiveBayes(iris[,1,drop=FALSE], iris[,5])
table(predict(m, iris[,1,drop=FALSE]), iris[,5])
Uwe Ligges
However, when I use two predictors, there is not error any more.
m<- naiveBayes(iris[,1:2], iris[,5])
table(predict(m, iris[,1:2]), iris[,5])
setosa versicolor virginica
setosa 49 0 0
versicolor 1 37 19
virginica 0 13 31
Do you know what is the problem?
Br,
Luffy
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and provide commented, minimal, self-contained, reproducible code.
