Hi everyone, I tried to write the code of computing R2 for a regression system but I failed. This is the code I use for computing RMSE: my_svm_model <- function(myformula, mydata, mytestdata) { mymodel <- svm(myformula, data=mydata) mytest <- predict(mymodel, mytestdata) error <- mytest - mytestdata[,1] -sqrt(mean(error**2)) } can anyone please tell me what I have to change to compute R2 instead of RMSE? Many thanks, Nancy _________________________________________________________________
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