Now I read it in the manual "If xtest is given, defaults to FALSE." Thanks for your help!
Jim Moshe Olshansky-2 wrote: > > You must use randomForest with keep.forest=TRUE - otherwise the Forest > object is not saved and so no prediction can be made. > > > --- On Mon, 16/6/08, Jim_S <[EMAIL PROTECTED]> wrote: > >> From: Jim_S <[EMAIL PROTECTED]> >> Subject: [R] randomForest, 'No forest component...' error while calling >> Predict() >> To: r-help@r-project.org >> Received: Monday, 16 June, 2008, 8:13 AM >> Dear R-users, >> >> While making a prediction using the randomForest function >> (package >> randomForest) I'm getting the following error message: >> >> "Error in predict.randomForest(model, newdata = CV) : >> No forest component >> in the object" >> Here's my complete code. For reproducing this task, >> please find my 2 data >> sets attached ( >> http://www.nabble.com/file/p17855119/data.rar data.rar ). >> >> Thanks in advance for any help! >> >> - Jim >> >> CT <- >> read.table("CT.txt",header=TRUE,sep="\t") >> CV <- >> read.table("CV.txt",header=TRUE,sep="\t") >> # Both CT & CV have the syntaxis X1, X2,...,X97,Y where >> all variables are >> numeric >> x <- CT[,-98] >> y <- CT[,98] >> xtest <- CV[,-98] >> ytest <- CV[,98] >> library(randomForest) >> model <- randomForest(x ,y , xtest, >> ytest,ntree=500,mtry=32,nodesize=5,nPerm=2) >> model >> >> #Call: >> # randomForest(x = x, y = y, xtest = xtest, ytest = ytest, >> ntree = 500, >> mtry = 32, nodesize = 5, >> # nPerm = 2) >> # Type of random forest: regression >> # Number of trees: 500 >> #No. of variables tried at each split: 32 >> # >> # Mean of squared residuals: 0.0022117 >> # % Var explained: -1.01 >> # Test set MSE: 0 >> # % Var explained: 2.61 >> >> >> prediction <- predict(model, newdata= CT) >> #Error in predict.randomForest(model, newdata = CV) : >> # No forest component in the object >> # >> -- >> View this message in context: >> http://www.nabble.com/randomForest%2C-%27No-forest-component...%27-error-while-calling-Predict%28%29-tp17855119p17855119.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> 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. > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/randomForest%2C-%27No-forest-component...%27-error-while-calling-Predict%28%29-tp17855119p17858931.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.