Dear all, I tried a simple naive Bayes classification on an artificial dataset, but I have troubles getting the predict function to work with the type="class" specification. With type= "raw", it works perfectly, but with type="class" I get following error :
Error in as.vector(x, mode) : invalid 'mode' argument Data : mixture.train is a training set with 100 points originating from 2 multivariate gaussian distributions (class 0 and class 1), with X1 and X2 as coordinates in a 2-dimensional space. Mixture.test is a grid going from -15 to +15 in both dimensions. Stupid data, but it's just to test. Code : Sigma <- matrix(c(10,3,3,2),2,2) mixture.train <- cbind(mvrnorm(n=50, c(0, 2), Sigma),rep(0,50)) mixture.train <- as.data.frame(rbind(mixture.train,cbind(mvrnorm(n=50, c(2, 0), Sigma),rep(1,50)))) names(mixture.train) <-c("X1","X2","Class") X1 <- rep(seq(-15,15,by=1),31) X2 <- rep(seq(-15,15,by=1),each = 31) mixture.test <- data.frame(X1,X2) Bayes.res <- naiveBayes(Class ~ X1 + X2, data=mixture.train) pred.bayes <-predict(Bayes.res, cbind(mixture.test$X1, mixture.test$X2),type="class") Tried it also with pred.bayes <-predict(Bayes.res, mixture.test,type="class"), but that gives the same effect. Is this a bug or am I missing something? Kind regards Joris Meys University Ghent [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.